diff --git a/programs/CMakeLists.txt b/programs/CMakeLists.txt
index 86a4ef51..90a6f7b0 100644
--- a/programs/CMakeLists.txt
+++ b/programs/CMakeLists.txt
@@ -1,3 +1,4 @@
 add_subdirectory( cli_wallet )
 add_subdirectory( witness_node )
 add_subdirectory( js_operation_serializer )
+add_subdirectory( size_checker )
diff --git a/programs/size_checker/CMakeLists.txt b/programs/size_checker/CMakeLists.txt
new file mode 100644
index 00000000..8d9e752d
--- /dev/null
+++ b/programs/size_checker/CMakeLists.txt
@@ -0,0 +1,7 @@
+add_executable( size_checker main.cpp )
+if( UNIX AND NOT APPLE )
+  set(rt_library rt )
+endif()
+
+target_link_libraries( size_checker
+                       PRIVATE graphene_chain fc ${CMAKE_DL_LIBS} ${PLATFORM_SPECIFIC_LIBS} )
diff --git a/programs/size_checker/main.cpp b/programs/size_checker/main.cpp
new file mode 100644
index 00000000..d81f469a
--- /dev/null
+++ b/programs/size_checker/main.cpp
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2015, Cryptonomex, Inc.
+ * All rights reserved.
+ *
+ * This source code is provided for evaluation in private test networks only, until September 8, 2015. After this date, this license expires and
+ * the code may not be used, modified or distributed for any purpose. Redistribution and use in source and binary forms, with or without modification,
+ * are permitted until September 8, 2015, provided that the following conditions are met:
+ *
+ * 1. The code and/or derivative works are used only for private test networks consisting of no more than 10 P2P nodes.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <fc/io/json.hpp>
+#include <fc/variant.hpp>
+#include <fc/variant_object.hpp>
+
+#include <graphene/chain/operations.hpp>
+
+#include <algorithm>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <vector>
+
+using namespace graphene::chain;
+
+vector< fc::variant_object > g_op_types;
+
+template< typename T >
+uint64_t get_wire_size()
+{
+   T data;
+   return fc::raw::pack( data ).size();
+}
+
+struct size_check_type_visitor
+{
+   typedef void result_type;
+
+   int t = 0;
+   size_check_type_visitor(int _t ):t(_t){}
+
+   template<typename Type>
+   result_type operator()( const Type& op )const
+   {
+      fc::mutable_variant_object vo;
+      vo["name"] = fc::get_typename<Type>::name();
+      vo["mem_size"] = sizeof( Type );
+      vo["wire_size"] = get_wire_size<Type>();
+      g_op_types.push_back( vo );
+   }
+};
+
+int main( int argc, char** argv )
+{
+   try
+   {
+      graphene::chain::operation op;
+
+      for( int32_t i = 0; i < op.count(); ++i )
+      {
+         op.set_which(i);
+         op.visit( size_check_type_visitor(i) );
+      }
+
+      // sort them by mem size
+      std::stable_sort( g_op_types.begin(), g_op_types.end(),
+      [](const variant_object& oa, const variant_object& ob) {
+      return oa["mem_size"].as_uint64() > ob["mem_size"].as_uint64();
+      });
+      std::cout << "[\n";
+      for( size_t i=0; i<g_op_types.size(); i++ )
+      {
+         std::cout << "   " << fc::json::to_string( g_op_types[i] );
+         if( i < g_op_types.size()-1 )
+            std::cout << ",\n";
+         else
+            std::cout << "\n";
+      }
+      std::cout << "]\n";
+   }
+   catch ( const fc::exception& e ){ edump((e.to_detail_string())); }
+   return 0;
+}