diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d83242a3..e473c298 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -120,6 +120,10 @@ if(NOT IOS)
   add_subdirectory(blockchain_utilities)
 endif()
 
+if(CMAKE_BUILD_TYPE STREQUAL Debug)
+  add_subdirectory(debug_utilities)
+endif()
+
 if(PER_BLOCK_CHECKPOINT)
   add_subdirectory(blocks)
 endif()
diff --git a/src/blockchain_utilities/CMakeLists.txt b/src/blockchain_utilities/CMakeLists.txt
index 628c037b..ffdaad4a 100644
--- a/src/blockchain_utilities/CMakeLists.txt
+++ b/src/blockchain_utilities/CMakeLists.txt
@@ -67,11 +67,6 @@ monero_private_headers(blockchain_export
 	  ${blockchain_export_private_headers})
 
 
-set(cn_deserialize_sources
-  cn_deserialize.cpp
-  )
-
-
 monero_add_executable(blockchain_import
   ${blockchain_import_sources}
   ${blockchain_import_private_headers}
@@ -122,21 +117,3 @@ set_property(TARGET blockchain_export
 	PROPERTY
 	OUTPUT_NAME "monero-blockchain-export")
 
-monero_add_executable(cn_deserialize
-  ${cn_deserialize_sources}
-  ${cn_deserialize_private_headers})
-
-target_link_libraries(cn_deserialize
-  LINK_PRIVATE
-    cryptonote_core
-    blockchain_db
-	p2p
-    epee
-    ${CMAKE_THREAD_LIBS_INIT})
-
-add_dependencies(cn_deserialize
-	version)
-set_property(TARGET cn_deserialize
-	PROPERTY
-	OUTPUT_NAME "monero-utils-deserialize")
-
diff --git a/src/debug_utilities/CMakeLists.txt b/src/debug_utilities/CMakeLists.txt
new file mode 100644
index 00000000..99198dc5
--- /dev/null
+++ b/src/debug_utilities/CMakeLists.txt
@@ -0,0 +1,73 @@
+# Copyright (c) 2014-2017, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# 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.
+
+set(cn_deserialize_sources
+  cn_deserialize.cpp
+  )
+
+monero_add_executable(cn_deserialize
+  ${cn_deserialize_sources}
+  ${cn_deserialize_private_headers})
+
+target_link_libraries(cn_deserialize
+  LINK_PRIVATE
+    cryptonote_core
+    blockchain_db
+    p2p
+    epee
+    ${CMAKE_THREAD_LIBS_INIT})
+
+add_dependencies(cn_deserialize
+	version)
+set_property(TARGET cn_deserialize
+	PROPERTY
+	OUTPUT_NAME "monero-utils-deserialize")
+
+
+set(object_sizes_sources
+  object_sizes.cpp
+  )
+
+monero_add_executable(object_sizes
+  ${object_sizes_sources}
+  ${object_sizes_private_headers})
+
+target_link_libraries(object_sizes
+  LINK_PRIVATE
+    cryptonote_core
+    blockchain_db
+    p2p
+    epee
+    ${CMAKE_THREAD_LIBS_INIT})
+
+add_dependencies(object_sizes
+	version)
+set_property(TARGET object_sizes
+	PROPERTY
+	OUTPUT_NAME "monero-utils-object-sizes")
+
diff --git a/src/blockchain_utilities/cn_deserialize.cpp b/src/debug_utilities/cn_deserialize.cpp
similarity index 98%
rename from src/blockchain_utilities/cn_deserialize.cpp
rename to src/debug_utilities/cn_deserialize.cpp
index b178e4e0..a1b56955 100644
--- a/src/blockchain_utilities/cn_deserialize.cpp
+++ b/src/debug_utilities/cn_deserialize.cpp
@@ -29,12 +29,11 @@
 #include "cryptonote_basic/cryptonote_basic.h"
 #include "cryptonote_basic/tx_extra.h"
 #include "cryptonote_core/blockchain.h"
-#include "blockchain_utilities.h"
 #include "common/command_line.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
-#define MONERO_DEFAULT_LOG_CATEGORY "bcutil"
+#define MONERO_DEFAULT_LOG_CATEGORY "debugtools.deserialize"
 
 namespace po = boost::program_options;
 using namespace epee;
diff --git a/src/debug_utilities/object_sizes.cpp b/src/debug_utilities/object_sizes.cpp
new file mode 100644
index 00000000..47ba5cf6
--- /dev/null
+++ b/src/debug_utilities/object_sizes.cpp
@@ -0,0 +1,116 @@
+// Copyright (c) 2017, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// 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 <map>
+#include "cryptonote_basic/cryptonote_basic.h"
+#include "cryptonote_basic/tx_extra.h"
+#include "cryptonote_core/blockchain.h"
+#include "p2p/p2p_protocol_defs.h"
+#include "p2p/connection_basic.hpp"
+#include "p2p/net_peerlist.h"
+#include "p2p/net_node.h"
+#include "cryptonote_protocol/cryptonote_protocol_handler.h"
+#include "blockchain_db/lmdb/db_lmdb.h"
+#include "wallet/wallet2.h"
+#include "wallet/api/wallet.h"
+#include "wallet/api/transaction_info.h"
+#include "wallet/api/transaction_history.h"
+#include "wallet/api/unsigned_transaction.h"
+#include "wallet/api/pending_transaction.h"
+
+#undef MONERO_DEFAULT_LOG_CATEGORY
+#define MONERO_DEFAULT_LOG_CATEGORY "debugtools.objectsizes"
+
+class size_logger
+{
+public:
+  ~size_logger()
+  {
+    for (const auto i: types)
+      std::cout << std::to_string(i.first) << "\t" << i.second << std::endl;
+  }
+  void add(const char *type, size_t size) { types.insert(std::make_pair(size, type)); }
+private:
+  std::multimap<size_t, const std::string> types;
+};
+#define SL(type) sl.add(#type, sizeof(type))
+
+int main(int argc, char* argv[])
+{
+  size_logger sl;
+
+  tools::sanitize_locale();
+
+  mlog_configure("", true);
+
+  SL(boost::thread);
+  SL(boost::asio::io_service);
+  SL(boost::asio::io_service::work);
+  SL(boost::asio::deadline_timer);
+
+  SL(cryptonote::DB_ERROR);
+  SL(cryptonote::mdb_txn_safe);
+  SL(cryptonote::mdb_threadinfo);
+
+  SL(cryptonote::block_header);
+  SL(cryptonote::block);
+  SL(cryptonote::transaction_prefix);
+  SL(cryptonote::transaction);
+
+  SL(cryptonote::txpool_tx_meta_t);
+
+  SL(epee::net_utils::network_address_base);
+  SL(epee::net_utils::ipv4_network_address);
+  SL(epee::net_utils::network_address);
+  SL(epee::net_utils::connection_context_base);
+  SL(epee::net_utils::connection_basic);
+
+  SL(nodetool::peerlist_entry);
+  SL(nodetool::anchor_peerlist_entry);
+  SL(nodetool::node_server<cryptonote::t_cryptonote_protocol_handler<cryptonote::core>>);
+  SL(nodetool::p2p_connection_context_t<cryptonote::t_cryptonote_protocol_handler<cryptonote::core>::connection_context>);
+  SL(nodetool::network_address_old);
+
+  SL(tools::wallet2::transfer_details);
+  SL(tools::wallet2::payment_details);
+  SL(tools::wallet2::unconfirmed_transfer_details);
+  SL(tools::wallet2::confirmed_transfer_details);
+  SL(tools::wallet2::tx_construction_data);
+  SL(tools::wallet2::pending_tx);
+  SL(tools::wallet2::unsigned_tx_set);
+  SL(tools::wallet2::signed_tx_set);
+
+  SL(Monero::WalletImpl);
+  SL(Monero::AddressBookRow);
+  SL(Monero::TransactionInfoImpl);
+  SL(Monero::TransactionHistoryImpl);
+  SL(Monero::PendingTransactionImpl);
+  SL(Monero::UnsignedTransactionImpl);
+
+  return 0;
+}