diff --git a/core/CellArray.h b/core/CellArray.h
index c9ee2831..f8925a60 100644
--- a/core/CellArray.h
+++ b/core/CellArray.h
@@ -156,6 +156,11 @@ public:
 		return m_Data;
 	}
 
+	size_t mem_usage()
+	{
+		return m_AllocSize * m_BlockSize * sizeof(cell_t);
+	}
+
 private:
 	bool GrowIfNeeded(size_t count)
 	{
diff --git a/core/ConVarManager.cpp b/core/ConVarManager.cpp
index 594ccfd8..f245efff 100644
--- a/core/ConVarManager.cpp
+++ b/core/ConVarManager.cpp
@@ -241,6 +241,12 @@ void ConVarManager::OnHandleDestroy(HandleType_t type, void *object)
 {
 }
 
+bool ConVarManager::GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+{
+	*pSize = sizeof(ConVar);
+	return true;
+}
+
 void ConVarManager::OnRootConsoleCommand(const char *cmdname, const CCommand &command)
 {
 	int argcount = command.ArgC();
diff --git a/core/ConVarManager.h b/core/ConVarManager.h
index d9cfea24..6757bbde 100644
--- a/core/ConVarManager.h
+++ b/core/ConVarManager.h
@@ -82,6 +82,7 @@ public: // SMGlobalClass
 	void OnSourceModVSPReceived();
 public: // IHandleTypeDispatch
 	void OnHandleDestroy(HandleType_t type, void *object);
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize);
 public: // IPluginsListener
 	void OnPluginUnloaded(IPlugin *plugin);
 public: //IRootConsoleCommand
diff --git a/core/MenuManager.cpp b/core/MenuManager.cpp
index e0846f5e..c68fe454 100644
--- a/core/MenuManager.cpp
+++ b/core/MenuManager.cpp
@@ -81,11 +81,29 @@ void MenuManager::OnHandleDestroy(HandleType_t type, void *object)
 	{
 		IBaseMenu *menu = (IBaseMenu *)object;
 		menu->Destroy(false);
-	} else if (type == m_StyleType) {
+	}
+	else if (type == m_StyleType)
+	{
 		/* Do nothing */
 	}
 }
 
+bool MenuManager::GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+{
+	if (type == m_MenuType)
+	{
+		*pSize = ((IBaseMenu *)object)->GetApproxMemUsage();
+		return true;
+	}
+	else
+	{
+		*pSize = ((IMenuStyle *)object)->GetApproxMemUsage();
+		return true;
+	}
+
+	return false;
+}
+
 Handle_t MenuManager::CreateMenuHandle(IBaseMenu *menu, IdentityToken_t *pOwner)
 {
 	if (m_MenuType == NO_HANDLE_TYPE)
diff --git a/core/MenuManager.h b/core/MenuManager.h
index 47c07360..c3f97af3 100644
--- a/core/MenuManager.h
+++ b/core/MenuManager.h
@@ -91,6 +91,7 @@ public:
 	unsigned int GetRemainingVoteDelay();
 public: //IHandleTypeDispatch
 	void OnHandleDestroy(HandleType_t type, void *object);
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize);
 public:
 	HandleError ReadMenuHandle(Handle_t handle, IBaseMenu **menu);
 	HandleError ReadStyleHandle(Handle_t handle, IMenuStyle **style);
diff --git a/core/MenuStyle_Base.cpp b/core/MenuStyle_Base.cpp
index fca46e6a..62f427eb 100644
--- a/core/MenuStyle_Base.cpp
+++ b/core/MenuStyle_Base.cpp
@@ -828,3 +828,10 @@ IMenuHandler *CBaseMenu::GetHandler()
 {
 	return m_pHandler;
 }
+
+unsigned int CBaseMenu::GetBaseMemUsage()
+{
+	return m_Title.size() 
+		+ m_Strings.GetMemTable()->GetMemUsage()
+		+ (m_items.size() * sizeof(CItem));
+}
diff --git a/core/MenuStyle_Base.h b/core/MenuStyle_Base.h
index 8d3df647..9cfe95a3 100644
--- a/core/MenuStyle_Base.h
+++ b/core/MenuStyle_Base.h
@@ -135,6 +135,7 @@ public:
 	virtual unsigned int GetMenuOptionFlags();
 	virtual void SetMenuOptionFlags(unsigned int flags);
 	virtual IMenuHandler *GetHandler();
+	unsigned int GetBaseMemUsage();
 private:
 	void InternalDelete();
 protected:
diff --git a/core/MenuStyle_Radio.cpp b/core/MenuStyle_Radio.cpp
index a1eee8ec..5efb3115 100644
--- a/core/MenuStyle_Radio.cpp
+++ b/core/MenuStyle_Radio.cpp
@@ -261,6 +261,11 @@ void CRadioStyle::ProcessWatchList()
 	}
 }
 
+unsigned int CRadioStyle::GetApproxMemUsage()
+{
+	return sizeof(CRadioStyle) + (sizeof(CRadioMenuPlayer) * 257);
+}
+
 CRadioDisplay::CRadioDisplay()
 {
 	Reset();
@@ -494,6 +499,13 @@ bool CRadioDisplay::SetSelectableKeys(unsigned int keymap)
 	return true;
 }
 
+unsigned int CRadioDisplay::GetApproxMemUsage()
+{
+	return sizeof(CRadioDisplay)
+		+ m_BufferText.size()
+		+ m_Title.size();
+}
+
 CRadioMenu::CRadioMenu(IMenuHandler *pHandler, IdentityToken_t *pOwner) : 
 CBaseMenu(pHandler, &g_RadioMenuStyle, pOwner)
 {
@@ -542,6 +554,11 @@ void CRadioMenu::Cancel_Finally()
 	g_RadioMenuStyle.CancelMenu(this);
 }
 
+unsigned int CRadioMenu::GetApproxMemUsage()
+{
+	return sizeof(CRadioMenu) + GetBaseMemUsage();
+}
+
 const char *g_RadioNumTable[11] = 
 {
 	"0. ", "1. ", "2. ", "3. ", "4. ", "5. ", "6. ", "7. ", "8. ", "9. ", "0. "
diff --git a/core/MenuStyle_Radio.h b/core/MenuStyle_Radio.h
index e8ba85f5..826c5de5 100644
--- a/core/MenuStyle_Radio.h
+++ b/core/MenuStyle_Radio.h
@@ -82,6 +82,7 @@ public: //IMenuStyle
 	IMenuPanel *CreatePanel();
 	IBaseMenu *CreateMenu(IMenuHandler *pHandler, IdentityToken_t *pOwner);
 	unsigned int GetMaxPageItems();
+	unsigned int GetApproxMemUsage();
 public: //IUserMessageListener
 	void OnUserMessage(int msg_id, bf_write *bf, IRecipientFilter *pFilter);
 	void OnUserMessageSent(int msg_id);
@@ -119,6 +120,7 @@ public: //IMenuPanel
 	unsigned int GetCurrentKey();
 	bool SetCurrentKey(unsigned int key);
 	int GetAmountRemaining();
+	unsigned int GetApproxMemUsage();
 public:
 	void DirectSet(const char *str, int keymap);
 private:
@@ -141,6 +143,7 @@ public:
 		unsigned int start_item,
 		IMenuHandler *alt_handler/* =NULL */);
 	void Cancel_Finally();
+	unsigned int GetApproxMemUsage();
 };
 
 extern CRadioStyle g_RadioMenuStyle;
diff --git a/core/MenuStyle_Valve.cpp b/core/MenuStyle_Valve.cpp
index dccace41..f51a85a0 100644
--- a/core/MenuStyle_Valve.cpp
+++ b/core/MenuStyle_Valve.cpp
@@ -163,6 +163,11 @@ bool ValveMenuStyle::DoClientMenu(int client, CBaseMenu *menu, unsigned int firs
 	return BaseMenuStyle::DoClientMenu(client, menu, first_item, mh, time);
 }
 
+unsigned int ValveMenuStyle::GetApproxMemUsage()
+{
+	return sizeof(ValveMenuStyle) + (sizeof(CValveMenuPlayer) * 257);
+}
+
 CValveMenuDisplay::CValveMenuDisplay()
 {
 	m_pKv = NULL;
@@ -342,6 +347,11 @@ int CValveMenuDisplay::GetAmountRemaining()
 	return -1;
 }
 
+unsigned int CValveMenuDisplay::GetApproxMemUsage()
+{
+	return sizeof(CValveMenuDisplay) + (sizeof(KeyValues) * m_NextPos * 10);
+}
+
 CValveMenu::CValveMenu(IMenuHandler *pHandler, IdentityToken_t *pOwner) : 
 CBaseMenu(pHandler, &g_ValveMenuStyle, pOwner), 
 	m_IntroColor(255, 0, 0, 255)
@@ -409,6 +419,11 @@ void CValveMenu::SetMenuOptionFlags(unsigned int flags)
 	CBaseMenu::SetMenuOptionFlags(flags);
 }
 
+unsigned int CValveMenu::GetApproxMemUsage()
+{
+	return sizeof(CValveMenu) + GetBaseMemUsage();
+}
+
 const char *g_OptionNumTable[] = 
 {
 	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10"
diff --git a/core/MenuStyle_Valve.h b/core/MenuStyle_Valve.h
index b59967c2..bf7bda4d 100644
--- a/core/MenuStyle_Valve.h
+++ b/core/MenuStyle_Valve.h
@@ -74,6 +74,7 @@ public: //IMenuStyle
 	IMenuPanel *CreatePanel();
 	IBaseMenu *CreateMenu(IMenuHandler *pHandler, IdentityToken_t *pOwner);
 	unsigned int GetMaxPageItems();
+	unsigned int GetApproxMemUsage();
 private:
 	void HookCreateMessage(edict_t *pEdict, DIALOG_TYPE type, KeyValues *kv, IServerPluginCallbacks *plugin);
 private:
@@ -103,6 +104,7 @@ public:
 	unsigned int GetCurrentKey();
 	bool SetCurrentKey(unsigned int key);
 	int GetAmountRemaining();
+	unsigned int GetApproxMemUsage();
 private:
 	KeyValues *m_pKv;
 	unsigned int m_NextPos;
@@ -126,6 +128,7 @@ public: //IBaseMenu
 		unsigned int start_item,
 		IMenuHandler *alt_handler/* =NULL */);
 	void SetMenuOptionFlags(unsigned int flags);
+	unsigned int GetApproxMemUsage();
 public: //CBaseMenu
 	void Cancel_Finally();
 private:
diff --git a/core/sm_memtable.h b/core/sm_memtable.h
index 744eb4b6..22743b7f 100644
--- a/core/sm_memtable.h
+++ b/core/sm_memtable.h
@@ -58,6 +58,10 @@ public:
 	 */
 	void Reset();
 
+	inline unsigned int GetMemUsage()
+	{
+		return size;
+	}
 
 private:
 	unsigned char *membase;
diff --git a/core/sm_trie.cpp b/core/sm_trie.cpp
index 14192d42..899ccd60 100644
--- a/core/sm_trie.cpp
+++ b/core/sm_trie.cpp
@@ -85,3 +85,8 @@ void sm_trie_clear(Trie *trie)
 {
 	trie->k.clear();
 }
+
+size_t sm_trie_mem_usage(Trie *trie)
+{
+	return trie->k.mem_usage();
+}
diff --git a/core/sm_trie.h b/core/sm_trie.h
index e3909dc2..6e25fbd1 100644
--- a/core/sm_trie.h
+++ b/core/sm_trie.h
@@ -41,5 +41,6 @@ bool sm_trie_replace(Trie *trie, const char *key, void *value);
 bool sm_trie_retrieve(Trie *trie, const char *key, void **value);
 bool sm_trie_delete(Trie *trie, const char *key);
 void sm_trie_clear(Trie *trie);
+size_t sm_trie_mem_usage(Trie *trie);
 
 #endif //_INCLUDE_SOURCEMOD_SIMPLE_TRIE_H_
diff --git a/core/smn_adt_array.cpp b/core/smn_adt_array.cpp
index a16fd479..cafcca54 100644
--- a/core/smn_adt_array.cpp
+++ b/core/smn_adt_array.cpp
@@ -56,6 +56,12 @@ public: //IHandleTypeDispatch
 		CellArray *array = (CellArray *)object;
 		delete array;
 	}
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		CellArray *pArray = (CellArray *)object;
+		*pSize = sizeof(CellArray) + pArray->mem_usage();
+		return true;
+	}
 } s_CellArrayHelpers;
 
 static cell_t CreateArray(IPluginContext *pContext, const cell_t *params)
diff --git a/core/smn_functions.cpp b/core/smn_functions.cpp
index d3b0c41a..24cade1b 100644
--- a/core/smn_functions.cpp
+++ b/core/smn_functions.cpp
@@ -78,6 +78,12 @@ public:
 
 		g_Forwards.ReleaseForward(pForward);
 	}
+
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		*pSize = sizeof(CForward) + (((IForward *)object)->GetFunctionCount() * 12);
+		return true;
+	}
 } g_ForwardNativeHelpers;
 
 
diff --git a/core/smn_keyvalues.cpp b/core/smn_keyvalues.cpp
index 025cc5c8..c098f40d 100644
--- a/core/smn_keyvalues.cpp
+++ b/core/smn_keyvalues.cpp
@@ -34,6 +34,7 @@
 #include "sm_stringutil.h"
 #include "HandleSys.h"
 #include <KeyValues.h>
+#include "utlbuffer.h"
 
 HandleType_t g_KeyValueType;
 
@@ -63,6 +64,30 @@ public:
 		pStk->pBase->deleteThis();
 		delete pStk;
 	}
+	int CalcKVSizeR(KeyValues *pv)
+	{
+		CUtlBuffer buf;
+		int size;
+
+		pv->RecursiveSaveToFile(buf, 0);
+		size = buf.TellMaxPut();
+
+		buf.Purge();
+
+		return size;
+	}
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		KeyValueStack *pStk = (KeyValueStack *)object;
+		unsigned int size = sizeof(KeyValueStack) + (pStk->pCurRoot.size() * sizeof(KeyValues *));
+
+		/* Check how much memory the actual thing takes up */		
+		size += CalcKVSizeR(pStk->pBase);
+
+		*pSize = size;
+
+		return true;
+	}
 };
 
 KeyValues *SourceModBase::ReadKeyValuesHandle(Handle_t hndl, HandleError *err, bool root)
diff --git a/core/smn_menus.cpp b/core/smn_menus.cpp
index 22534c7e..13473ee4 100644
--- a/core/smn_menus.cpp
+++ b/core/smn_menus.cpp
@@ -160,6 +160,12 @@ public:
 		panel->DeleteThis();
 	}
 
+	virtual bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		*pSize = ((IMenuPanel *)object)->GetApproxMemUsage();
+		return true;
+	}
+
 	/**
 	 * It is extremely important that unloaded plugins don't crash.
 	 * Thus, if a plugin unloads, we run through every handler we have.
diff --git a/core/smn_textparse.cpp b/core/smn_textparse.cpp
index 38a23e24..78b26304 100644
--- a/core/smn_textparse.cpp
+++ b/core/smn_textparse.cpp
@@ -169,6 +169,12 @@ public:
 		ParseInfo *parse = (ParseInfo *)object;
 		delete parse;
 	}
+
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		*pSize = sizeof(ParseInfo);
+		return true;
+	}
 };
 
 TextParseGlobals g_TextParseGlobals;
diff --git a/core/smn_usermsgs.cpp b/core/smn_usermsgs.cpp
index d560dfbe..083d333c 100644
--- a/core/smn_usermsgs.cpp
+++ b/core/smn_usermsgs.cpp
@@ -57,6 +57,7 @@ public: //SMGlobalClass, IHandleTypeDispatch, IPluginListener
 	void OnSourceModAllInitialized();
 	void OnSourceModShutdown();
 	void OnHandleDestroy(HandleType_t type, void *object);
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize);
 	void OnPluginUnloaded(IPlugin *plugin);
 public:
 	MsgListenerWrapper *CreateListener(IPluginContext *pCtx);
@@ -109,6 +110,15 @@ void UsrMessageNatives::OnHandleDestroy(HandleType_t type, void *object)
 {
 }
 
+bool UsrMessageNatives::GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+{
+	bf_read *pRead = (bf_read *)object;
+
+	*pSize = sizeof(bf_read) + pRead->GetNumBytesRead() + pRead->GetNumBytesLeft();
+
+	return true;
+}
+
 void UsrMessageNatives::OnPluginUnloaded(IPlugin *plugin)
 {
 	MsgWrapperList *pList;
diff --git a/core/systems/HandleSys.cpp b/core/systems/HandleSys.cpp
index 5d0e9885..951e0cb9 100644
--- a/core/systems/HandleSys.cpp
+++ b/core/systems/HandleSys.cpp
@@ -36,6 +36,7 @@
 #include "Logger.h"
 #include <assert.h>
 #include <string.h>
+#include "sm_stringutil.h"
 
 HandleSystem g_HandleSys;
 
@@ -996,8 +997,9 @@ bool HandleSystem::TryAndFreeSomeHandles()
 
 void HandleSystem::Dump(HANDLE_REPORTER rep)
 {
-	rep("%-10.10s\t%-20.20s\t%-20.20s", "Handle", "Owner", "Type");
-	rep("---------------------------------------------");
+	unsigned int total_size = 0;
+	rep("%-10.10s\t%-20.20s\t%-20.20s\t%-10.10s", "Handle", "Owner", "Type", "Memory");
+	rep("--------------------------------------------------------------------------");
 	for (unsigned int i = 1; i <= m_HandleTail; i++)
 	{
 		if (m_Handles[i].set != HandleSet_Used)
@@ -1042,11 +1044,24 @@ void HandleSystem::Dump(HANDLE_REPORTER rep)
 		}
 		const char *type = "ANON";
 		QHandleType *pType = &m_Types[m_Handles[i].type];
+		unsigned int size = 0;
 		if (pType->nameIdx != -1)
 		{
 			type = m_strtab->GetString(pType->nameIdx);
 		}
-		rep("0x%08x\t%-20.20s\t%-20.20s", index, owner, type);
+		if (pType->dispatch->GetDispatchVersion() < HANDLESYS_MEMUSAGE_MIN_VERSION
+			|| !pType->dispatch->GetHandleApproxSize(m_Handles[i].type, m_Handles[i].object, &size))
+		{
+			rep("0x%08x\t%-20.20s\t%-20.20s\t%-10.10s", index, owner, type, "-1");
+		}
+		else
+		{
+			char buffer[32];
+			UTIL_Format(buffer, sizeof(buffer), "%d", size);
+			rep("0x%08x\t%-20.20s\t%-20.20s\t%-10.10s", index, owner, type, buffer);
+			total_size += size;
+		}
 	}
+	rep("-- Approximately %d bytes of memory are in use by Handles.\n", total_size);
 }
 
diff --git a/core/systems/HandleSys.h b/core/systems/HandleSys.h
index c49b1510..b76c1896 100644
--- a/core/systems/HandleSys.h
+++ b/core/systems/HandleSys.h
@@ -48,6 +48,8 @@
 #define HANDLESYS_SERIAL_MASK		0xFFFF0000
 #define HANDLESYS_HANDLE_MASK		0x0000FFFF
 
+#define HANDLESYS_MEMUSAGE_MIN_VERSION		3
+
 /**
  *   The QHandle is a nasty structure that compacts the handle system into a big vector.
  * The members of the vector each encapsulate one Handle, however, they also act as nodes
diff --git a/core/systems/PluginSys.cpp b/core/systems/PluginSys.cpp
index d18aa689..e8225662 100644
--- a/core/systems/PluginSys.cpp
+++ b/core/systems/PluginSys.cpp
@@ -123,6 +123,80 @@ void CPlugin::InitIdentity()
 	}
 }
 
+unsigned int CPlugin::CalcMemUsage()
+{
+	unsigned int base_size = 
+		sizeof(CPlugin) 
+		+ sizeof(IdentityToken_t)
+		+ (m_PhraseFiles.size() * sizeof(unsigned int))
+		+ (m_dependents.size() * sizeof(CPlugin *))
+		+ (m_dependsOn.size() * sizeof(CPlugin *))
+		+ (m_fakeNatives.size() * (sizeof(FakeNative *) + sizeof(FakeNative)))
+		+ (m_WeakNatives.size() * sizeof(WeakNative))
+		+ (m_configs.size() * (sizeof(AutoConfig *) + sizeof(AutoConfig)))
+		+ sm_trie_mem_usage(m_pProps);
+
+	for (unsigned int i = 0; i < m_configs.size(); i++)
+	{
+		base_size += m_configs[i]->autocfg.size();
+		base_size += m_configs[i]->folder.size();
+	}
+
+	for (List<String>::iterator i = m_Libraries.begin();
+		 i != m_Libraries.end();
+		 i++)
+	{
+		base_size += (*i).size();
+	}
+
+	for (List<String>::iterator i = m_RequiredLibs.begin();
+		 i != m_RequiredLibs.end();
+		 i++)
+	{
+		base_size += (*i).size();
+	}
+
+	for (List<FakeNative *>::iterator i = m_fakeNatives.begin();
+		 i != m_fakeNatives.end();
+		 i++)
+	{
+		base_size += (*i)->name.size();
+	}
+
+	if (m_plugin != NULL)
+	{
+		base_size += sizeof(sp_plugin_t);
+		base_size += m_plugin->data_size;
+		base_size += m_plugin->pcode_size;
+		base_size += (m_plugin->info.natives_num * sizeof(sp_file_natives_t));
+		base_size += (m_plugin->info.publics_num * sizeof(sp_file_publics_t));
+		base_size += (m_plugin->info.pubvars_num * sizeof(sp_file_pubvars_t));
+		base_size += (m_plugin->debug.files_num * sizeof(sp_fdbg_file_t));
+		base_size += (m_plugin->debug.lines_num * sizeof(sp_fdbg_line_t));
+		base_size += (m_plugin->debug.syms_num * sizeof(sp_fdbg_symbol_t));
+		/* We can't get strtab size, oh well. */
+	}
+
+	if (m_ctx.base != NULL)
+	{
+		base_size += sizeof(BaseContext);
+		base_size += m_ctx.base->GetPublicsNum() * sizeof(CFunction);
+	}
+	if (m_ctx.ctx != NULL)
+	{
+		base_size += m_ctx.ctx->mem_size;
+		base_size += (m_plugin->debug.files_num * sizeof(sp_debug_file_t));
+		base_size += (m_plugin->debug.lines_num * sizeof(sp_debug_line_t));
+		base_size += (m_plugin->debug.syms_num * sizeof(sp_debug_symbol_t));
+		base_size += (m_plugin->info.pubvars_num * sizeof(sp_pubvar_t));
+		base_size += (m_plugin->info.publics_num * sizeof(sp_public_t));
+		base_size += (m_plugin->info.natives_num * sizeof(sp_native_t));
+		/* We also don't know the JIT code size, oh well. */
+	}
+
+	return base_size;
+}
+
 Handle_t CPlugin::GetMyHandle()
 {
 	return m_handle;
@@ -1969,6 +2043,12 @@ void CPluginManager::OnHandleDestroy(HandleType_t type, void *object)
 	/* We don't care about the internal object, actually */
 }
 
+bool CPluginManager::GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+{
+	*pSize = ((CPlugin *)object)->CalcMemUsage();
+	return true;
+}
+
 void CPluginManager::RegisterNativesFromCore(sp_nativeinfo_t *natives)
 {
 	for (unsigned int i = 0; natives[i].func != NULL; i++)
diff --git a/core/systems/PluginSys.h b/core/systems/PluginSys.h
index ce70a16f..f51b0f5a 100644
--- a/core/systems/PluginSys.h
+++ b/core/systems/PluginSys.h
@@ -169,6 +169,7 @@ public:
 	unsigned int GetSerial();
 	const sp_plugin_t *GetPluginStructure();
 	IdentityToken_t *GetIdentity();
+	unsigned int CalcMemUsage();
 	bool SetProperty(const char *prop, void *ptr);
 	bool GetProperty(const char *prop, void **ptr, bool remove=false);
 public:
@@ -355,6 +356,7 @@ public: //SMGlobalClass
 	void OnSourceModShutdown();
 public: //IHandleTypeDispatch
 	void OnHandleDestroy(HandleType_t type, void *object);
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize);
 public: //IRootConsoleCommand
 	void OnRootConsoleCommand(const char *cmdname, const CCommand &command);
 public:
diff --git a/extensions/topmenus/TopMenu.cpp b/extensions/topmenus/TopMenu.cpp
index 53b266ec..61b14620 100644
--- a/extensions/topmenus/TopMenu.cpp
+++ b/extensions/topmenus/TopMenu.cpp
@@ -87,6 +87,29 @@ TopMenu::~TopMenu()
 	delete [] m_clients;
 }
 
+unsigned int TopMenu::CalcMemUsage()
+{
+	unsigned int size = sizeof(TopMenu);
+
+	size += m_Config.strings.GetMemTable()->MemUsage();
+	size += (m_Config.cats.size() * sizeof(int));
+	size += (sizeof(topmenu_player_t) * m_max_clients);
+	size += (m_SortedCats.size() * sizeof(unsigned int));
+	size += (m_UnsortedCats.size() * sizeof(unsigned int));
+	size += (m_Categories.size() * (sizeof(topmenu_category_t *) + sizeof(topmenu_category_t)));
+	size += (m_Objects.size() * (sizeof(topmenu_object_t *) + sizeof(topmenu_object_t)));
+	size += m_ObjLookup.mem_usage();
+
+	for (size_t i = 0; i < m_Categories.size(); i++)
+	{
+		size += m_Categories[i]->obj_list.size() * sizeof(topmenu_object_t *);
+		size += m_Categories[i]->sorted.size() * sizeof(topmenu_object_t *);
+		size += m_Categories[i]->unsorted.size() * sizeof(topmenu_object_t *);
+	}
+
+	return size;
+}
+
 void TopMenu::OnClientConnected(int client)
 {
 	if (m_clients == NULL)
diff --git a/extensions/topmenus/TopMenu.h b/extensions/topmenus/TopMenu.h
index c4c0ec86..2747c778 100644
--- a/extensions/topmenus/TopMenu.h
+++ b/extensions/topmenus/TopMenu.h
@@ -146,6 +146,8 @@ public: //ITextListener_SMC
 	SMCResult ReadSMC_NewSection(const SMCStates *states, const char *name);
 	SMCResult ReadSMC_KeyValue(const SMCStates *states, const char *key, const char *value);
 	SMCResult ReadSMC_LeavingSection(const SMCStates *states);
+public:
+	unsigned int CalcMemUsage();
 private:
 	void SortCategoriesIfNeeded();
 	void SortCategoryIfNeeded(unsigned int category);
diff --git a/extensions/topmenus/sdk/sm_memtable.h b/extensions/topmenus/sdk/sm_memtable.h
index 744eb4b6..7c7f00a2 100644
--- a/extensions/topmenus/sdk/sm_memtable.h
+++ b/extensions/topmenus/sdk/sm_memtable.h
@@ -58,6 +58,10 @@ public:
 	 */
 	void Reset();
 
+	inline unsigned int MemUsage()
+	{
+		return size;
+	}
 
 private:
 	unsigned char *membase;
diff --git a/extensions/topmenus/smn_topmenus.cpp b/extensions/topmenus/smn_topmenus.cpp
index 98575ec7..cb68c592 100644
--- a/extensions/topmenus/smn_topmenus.cpp
+++ b/extensions/topmenus/smn_topmenus.cpp
@@ -43,6 +43,11 @@ public:
 		ITopMenu *pTopMenu = (ITopMenu *)object;
 		g_TopMenus.DestroyTopMenu(pTopMenu);
 	}
+	bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+	{
+		*pSize = ((TopMenu *)object)->CalcMemUsage();
+		return true;
+	}
 } s_TopMenuHandle;
 
 void Initialize_Natives()
diff --git a/public/IHandleSys.h b/public/IHandleSys.h
index 55dc5fa5..b92cf828 100644
--- a/public/IHandleSys.h
+++ b/public/IHandleSys.h
@@ -52,7 +52,7 @@
 #include <sp_vm_types.h>
 
 #define SMINTERFACE_HANDLESYSTEM_NAME			"IHandleSys"
-#define SMINTERFACE_HANDLESYSTEM_VERSION		2
+#define SMINTERFACE_HANDLESYSTEM_VERSION		3
 
 /** Specifies no Identity */
 #define DEFAULT_IDENTITY			NULL
@@ -195,8 +195,25 @@ namespace SourceMod
 	public:
 		/**
 		 * @brief Called when destroying a handle.  Must be implemented.
+		 *
+		 * @param type		Handle type.
+		 * @param object	Handle internal object.
 		 */
 		virtual void OnHandleDestroy(HandleType_t type, void *object) =0;
+
+		/**
+		 * @brief Called to get the size of a handle's memory usage in bytes.
+		 * Implementation is optional.
+		 *
+		 * @param type		Handle type.
+		 * @param object	Handle internal object.
+		 * @param pSize		Pointer to store the approximate memory usage in bytes.
+		 * @return			True on success, false if not implemented.
+		 */
+		virtual bool GetHandleApproxSize(HandleType_t type, void *object, unsigned int *pSize)
+		{
+			return false;
+		}
 	};
 
 	/**
diff --git a/public/IMenuManager.h b/public/IMenuManager.h
index cb97a2f4..16099f23 100644
--- a/public/IMenuManager.h
+++ b/public/IMenuManager.h
@@ -36,7 +36,7 @@
 #include <IHandleSys.h>
 
 #define SMINTERFACE_MENUMANAGER_NAME		"IMenuManager"
-#define SMINTERFACE_MENUMANAGER_VERSION		13
+#define SMINTERFACE_MENUMANAGER_VERSION		14
 
 /**
  * @file IMenuManager.h
@@ -323,6 +323,13 @@ namespace SourceMod
 		 *						-1, then the panel has no text limit.
 		 */
 		virtual int GetAmountRemaining() =0;
+
+		/**
+		 * @brief For the Handle system, returns approximate memory usage.
+		 *
+		 * @return				Approximate number of bytes being used.
+		 */
+		virtual unsigned int GetApproxMemUsage() =0;
 	};
 
 	/**
@@ -406,6 +413,13 @@ namespace SourceMod
 		 * @return				Handle_t pointing to this object.
 		 */
 		virtual Handle_t GetHandle() =0;
+
+		/**
+		 * @brief For the Handle system, returns approximate memory usage.
+		 *
+		 * @return				Approximate number of bytes being used.
+		 */
+		virtual unsigned int GetApproxMemUsage() =0;
 	};
 
 	/**
@@ -597,6 +611,13 @@ namespace SourceMod
 			unsigned int time,
 			unsigned int start_item,
 			IMenuHandler *alt_handler=NULL) =0;
+
+		/**
+		 * @brief For the Handle system, returns approximate memory usage.
+		 *
+		 * @return				Approximate number of bytes being used.
+		 */
+		virtual unsigned int GetApproxMemUsage() =0;
 	};
 
 	/** 
diff --git a/public/sm_trie_tpl.h b/public/sm_trie_tpl.h
index 1aed1a38..195e1988 100644
--- a/public/sm_trie_tpl.h
+++ b/public/sm_trie_tpl.h
@@ -877,6 +877,13 @@ private:
 
 		return x_check_multi(offsets, count, to_check+1);
 	}
+public:
+	size_t mem_usage()
+	{
+		return (sizeof(KTrieNode) * (m_baseSize))
+			+ m_stSize
+			+ sizeof(KTrieNode);
+	}
 private:
 	KTrieNode *m_base;			/* Base array for the sparse tables */
 	KTrieNode *m_empty;			/* Special case for empty strings */