diff --git a/libraries/core_libs/consensus/include/final_chain/data.hpp b/libraries/core_libs/consensus/include/final_chain/data.hpp
index 8c9c1f1105..2ec581b685 100644
--- a/libraries/core_libs/consensus/include/final_chain/data.hpp
+++ b/libraries/core_libs/consensus/include/final_chain/data.hpp
@@ -5,12 +5,10 @@
 #include <libdevcore/Log.h>
 #include <libdevcore/SHA3.h>
 
-#include <algorithm>
+#include <memory>
 
-#include "common/constants.hpp"
 #include "common/encoding_rlp.hpp"
 #include "common/types.hpp"
-#include "final_chain/state_api_data.hpp"
 #include "transaction/transaction.hpp"
 
 namespace taraxa {
@@ -41,16 +39,19 @@ struct BlockHeader {
   uint64_t timestamp = 0;
   Address author;
   u256 total_reward;
+  uint64_t size = 0;
 
   HAS_RLP_FIELDS
 
-  static h256 const& uncles_hash();
+  static const h256& uncles_hash();
 
-  static Nonce const& nonce();
+  static const Nonce& nonce();
 
-  static u256 const& difficulty();
+  static const u256& difficulty();
 
-  static h256 const& mix_hash();
+  static const h256& mix_hash();
+
+  static std::shared_ptr<BlockHeader> from_rlp(const dev::RLP& rlp);
 
   void ethereum_rlp(dev::RLPStream& encoding) const;
 };
diff --git a/libraries/core_libs/consensus/src/final_chain/data.cpp b/libraries/core_libs/consensus/src/final_chain/data.cpp
index 73b2525ece..5747ea9ad9 100644
--- a/libraries/core_libs/consensus/src/final_chain/data.cpp
+++ b/libraries/core_libs/consensus/src/final_chain/data.cpp
@@ -2,16 +2,28 @@
 
 #include <libdevcore/CommonJS.h>
 
+#include "common/constants.hpp"
+
 namespace taraxa::final_chain {
 
-h256 const& BlockHeader::uncles_hash() { return EmptyRLPListSHA3(); }
+const h256& BlockHeader::uncles_hash() { return EmptyRLPListSHA3(); }
+
+const Nonce& BlockHeader::nonce() { return EmptyNonce(); }
 
-Nonce const& BlockHeader::nonce() { return EmptyNonce(); }
+const u256& BlockHeader::difficulty() { return ZeroU256(); }
 
-u256 const& BlockHeader::difficulty() { return ZeroU256(); }
+const h256& BlockHeader::mix_hash() { return ZeroHash(); }
 
-h256 const& BlockHeader::mix_hash() { return ZeroHash(); }
+std::shared_ptr<BlockHeader> BlockHeader::from_rlp(const dev::RLP& rlp) {
+  auto ret = std::make_shared<BlockHeader>();
+  ret->rlp(rlp);
+  dev::RLPStream encoding;
+  ret->ethereum_rlp(encoding);
+  ret->size = encoding.out().size();
+  return ret;
+}
 
+// TODO[2888]: remove hash field to not store it in the db
 RLP_FIELDS_DEFINE(BlockHeader, hash, parent_hash, author, state_root, transactions_root, receipts_root, log_bloom,
                   number, gas_limit, gas_used, timestamp, total_reward, extra_data)
 
diff --git a/libraries/core_libs/consensus/src/final_chain/final_chai_impl.cpp b/libraries/core_libs/consensus/src/final_chain/final_chai_impl.cpp
index 4c77e95324..6e623da3d1 100644
--- a/libraries/core_libs/consensus/src/final_chain/final_chai_impl.cpp
+++ b/libraries/core_libs/consensus/src/final_chain/final_chai_impl.cpp
@@ -525,9 +525,7 @@ const SharedTransactions FinalChainImpl::get_transactions(std::optional<EthBlock
 
 std::shared_ptr<const BlockHeader> FinalChainImpl::get_block_header(EthBlockNumber n) const {
   if (auto raw = db_->lookup(n, DB::Columns::final_chain_blk_by_number); !raw.empty()) {
-    auto ret = std::make_shared<BlockHeader>();
-    ret->rlp(dev::RLP(raw));
-    return ret;
+    return BlockHeader::from_rlp(dev::RLP(raw));
   }
   return {};
 }
diff --git a/libraries/core_libs/network/rpc/eth/Eth.cpp b/libraries/core_libs/network/rpc/eth/Eth.cpp
index 517b7b1fa1..7fcbdc5bc8 100644
--- a/libraries/core_libs/network/rpc/eth/Eth.cpp
+++ b/libraries/core_libs/network/rpc/eth/Eth.cpp
@@ -68,6 +68,7 @@ Json::Value toJson(const BlockHeader& obj) {
   res["difficulty"] = "0x0";
   res["totalDifficulty"] = "0x0";
   res["totalReward"] = toJS(obj.total_reward);
+  res["size"] = toJS(obj.size);
   return res;
 }