diff --git a/crates/optimism/primitives/src/tx_type.rs b/crates/optimism/primitives/src/tx_type.rs
index 1b50592012..70f5fd32d8 100644
--- a/crates/optimism/primitives/src/tx_type.rs
+++ b/crates/optimism/primitives/src/tx_type.rs
@@ -13,7 +13,7 @@ use derive_more::{
     Display,
 };
 use op_alloy_consensus::OpTxType as AlloyOpTxType;
-use reth_primitives_traits::TxType;
+use reth_primitives_traits::{InMemorySize, TxType};
 
 #[cfg(feature = "reth-codec")]
 use alloy_consensus::constants::EIP7702_TX_TYPE_ID;
@@ -57,6 +57,14 @@ impl TxType for OpTxType {
     }
 }
 
+impl InMemorySize for OpTxType {
+    /// Calculates a heuristic for the in-memory size of the [`OpTxType`].
+    #[inline]
+    fn size(&self) -> usize {
+        core::mem::size_of::<Self>()
+    }
+}
+
 impl From<OpTxType> for U8 {
     fn from(tx_type: OpTxType) -> Self {
         Self::from(u8::from(tx_type))
diff --git a/crates/primitives-traits/src/receipt.rs b/crates/primitives-traits/src/receipt.rs
index 31bded015d..b34590dff0 100644
--- a/crates/primitives-traits/src/receipt.rs
+++ b/crates/primitives-traits/src/receipt.rs
@@ -7,6 +7,8 @@ use core::fmt;
 use reth_codecs::Compact;
 use serde::{Deserialize, Serialize};
 
+use crate::InMemorySize;
+
 /// Helper trait that unifies all behaviour required by receipt to support full node operations.
 pub trait FullReceipt: Receipt + Compact {}
 
@@ -25,6 +27,7 @@ pub trait Receipt:
     + alloy_rlp::Encodable
     + alloy_rlp::Decodable
     + Serialize
+    + InMemorySize
     + for<'de> Deserialize<'de>
 {
     /// Returns transaction type.
diff --git a/crates/primitives-traits/src/transaction/signed.rs b/crates/primitives-traits/src/transaction/signed.rs
index 958d5cd6c7..7b6abbaec0 100644
--- a/crates/primitives-traits/src/transaction/signed.rs
+++ b/crates/primitives-traits/src/transaction/signed.rs
@@ -8,7 +8,7 @@ use alloy_primitives::{keccak256, Address, PrimitiveSignature, TxHash, B256};
 use reth_codecs::Compact;
 use revm_primitives::TxEnv;
 
-use crate::{FullTransaction, MaybeArbitrary, Transaction};
+use crate::{FullTransaction, InMemorySize, MaybeArbitrary, Transaction};
 
 /// Helper trait that unifies all behaviour required by block to support full node operations.
 pub trait FullSignedTx: SignedTransaction<Transaction: FullTransaction> + Compact {}
@@ -35,6 +35,7 @@ pub trait SignedTransaction:
     + Decodable2718
     + alloy_consensus::Transaction
     + MaybeArbitrary
+    + InMemorySize
 {
     /// Transaction type that is signed.
     type Transaction: Transaction;
diff --git a/crates/primitives-traits/src/tx_type.rs b/crates/primitives-traits/src/tx_type.rs
index b1828ad57d..d9ef687759 100644
--- a/crates/primitives-traits/src/tx_type.rs
+++ b/crates/primitives-traits/src/tx_type.rs
@@ -3,6 +3,8 @@ use core::fmt;
 use alloy_primitives::{U64, U8};
 use reth_codecs::Compact;
 
+use crate::InMemorySize;
+
 /// Helper trait that unifies all behaviour required by transaction type ID to support full node
 /// operations.
 pub trait FullTxType: TxType + Compact {}
@@ -29,6 +31,7 @@ pub trait TxType:
     + TryFrom<U64>
     + alloy_rlp::Encodable
     + alloy_rlp::Decodable
+    + InMemorySize
 {
     /// Returns `true` if this is a legacy transaction.
     fn is_legacy(&self) -> bool;
diff --git a/crates/primitives/src/receipt.rs b/crates/primitives/src/receipt.rs
index b61ee7c14d..f4567de421 100644
--- a/crates/primitives/src/receipt.rs
+++ b/crates/primitives/src/receipt.rs
@@ -1,5 +1,6 @@
 use alloc::{vec, vec::Vec};
 use core::cmp::Ordering;
+use reth_primitives_traits::InMemorySize;
 
 use alloy_consensus::{
     constants::{EIP1559_TX_TYPE_ID, EIP2930_TX_TYPE_ID, EIP4844_TX_TYPE_ID, EIP7702_TX_TYPE_ID},
@@ -109,6 +110,22 @@ impl ReceiptExt for Receipt {
     }
 }
 
+impl InMemorySize for Receipt {
+    /// Calculates a heuristic for the in-memory size of the [Receipt].
+    #[inline]
+    fn size(&self) -> usize {
+        let total_size = self.tx_type.size() +
+            core::mem::size_of::<bool>() +
+            core::mem::size_of::<u64>() +
+            self.logs.capacity() * core::mem::size_of::<Log>();
+
+        #[cfg(feature = "optimism")]
+        return total_size + 2 * core::mem::size_of::<Option<u64>>();
+        #[cfg(not(feature = "optimism"))]
+        total_size
+    }
+}
+
 /// A collection of receipts organized as a two-dimensional vector.
 #[derive(
     Clone,
diff --git a/crates/primitives/src/transaction/mod.rs b/crates/primitives/src/transaction/mod.rs
index 015621cdcc..aa57ef8d81 100644
--- a/crates/primitives/src/transaction/mod.rs
+++ b/crates/primitives/src/transaction/mod.rs
@@ -1274,12 +1274,6 @@ impl TransactionSigned {
         initial_tx
     }
 
-    /// Calculate a heuristic for the in-memory size of the [`TransactionSigned`].
-    #[inline]
-    pub fn size(&self) -> usize {
-        mem::size_of::<TxHash>() + self.transaction.size() + mem::size_of::<Signature>()
-    }
-
     /// Decodes legacy transaction from the data buffer into a tuple.
     ///
     /// This expects `rlp(legacy_tx)`
@@ -1447,6 +1441,14 @@ impl SignedTransaction for TransactionSigned {
     }
 }
 
+impl InMemorySize for TransactionSigned {
+    /// Calculate a heuristic for the in-memory size of the [`TransactionSigned`].
+    #[inline]
+    fn size(&self) -> usize {
+        mem::size_of::<TxHash>() + self.transaction.size() + mem::size_of::<Signature>()
+    }
+}
+
 impl alloy_consensus::Transaction for TransactionSigned {
     fn chain_id(&self) -> Option<ChainId> {
         self.deref().chain_id()
diff --git a/crates/primitives/src/transaction/tx_type.rs b/crates/primitives/src/transaction/tx_type.rs
index 3445cb184c..caa6d87285 100644
--- a/crates/primitives/src/transaction/tx_type.rs
+++ b/crates/primitives/src/transaction/tx_type.rs
@@ -5,6 +5,7 @@ use alloy_consensus::constants::{
 use alloy_primitives::{U64, U8};
 use alloy_rlp::{Decodable, Encodable};
 use derive_more::Display;
+use reth_primitives_traits::InMemorySize;
 use serde::{Deserialize, Serialize};
 
 /// Identifier parameter for legacy transaction
@@ -118,6 +119,14 @@ impl reth_primitives_traits::TxType for TxType {
     }
 }
 
+impl InMemorySize for TxType {
+    /// Calculates a heuristic for the in-memory size of the [`TxType`].
+    #[inline]
+    fn size(&self) -> usize {
+        core::mem::size_of::<Self>()
+    }
+}
+
 impl From<TxType> for u8 {
     fn from(value: TxType) -> Self {
         match value {
diff --git a/crates/transaction-pool/src/test_utils/mock.rs b/crates/transaction-pool/src/test_utils/mock.rs
index fc43349f3f..69f1835edc 100644
--- a/crates/transaction-pool/src/test_utils/mock.rs
+++ b/crates/transaction-pool/src/test_utils/mock.rs
@@ -28,6 +28,7 @@ use reth_primitives::{
     transaction::TryFromRecoveredTransactionError, PooledTransactionsElementEcRecovered,
     Transaction, TransactionSigned, TransactionSignedEcRecovered, TxType,
 };
+use reth_primitives_traits::InMemorySize;
 use std::{ops::Range, sync::Arc, time::Instant, vec::IntoIter};
 
 /// A transaction pool implementation using [`MockOrdering`] for transaction ordering.