diff --git a/pkg/core/state/nep5.go b/pkg/core/state/nep5.go
index 60ed630f9..9ca8a0466 100644
--- a/pkg/core/state/nep5.go
+++ b/pkg/core/state/nep5.go
@@ -106,6 +106,11 @@ func (lg *NEP5TransferLog) ForEach(f func(*NEP5Transfer) error) error {
 	return nil
 }
 
+// Size returns an amount of transfer written in log.
+func (lg *NEP5TransferLog) Size() int {
+	return len(lg.Raw) / NEP5TransferSize
+}
+
 // EncodeBinary implements io.Serializable interface.
 func (t *NEP5Tracker) EncodeBinary(w *io.BinWriter) {
 	w.WriteU64LE(uint64(t.Balance))
diff --git a/pkg/core/state/nep5_test.go b/pkg/core/state/nep5_test.go
index b4e70f5ea..36c20f7b5 100644
--- a/pkg/core/state/nep5_test.go
+++ b/pkg/core/state/nep5_test.go
@@ -25,6 +25,8 @@ func TestNEP5TransferLog_Append(t *testing.T) {
 		require.NoError(t, lg.Append(tr))
 	}
 
+	require.Equal(t, len(expected), lg.Size())
+
 	i := 0
 	err := lg.ForEach(func(tr *NEP5Transfer) error {
 		require.Equal(t, expected[i], tr)