diff --git a/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/flatrecords/FlatRecord.java b/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/flatrecords/FlatRecord.java
index 32142fb20..f261e5fb4 100644
--- a/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/flatrecords/FlatRecord.java
+++ b/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/flatrecords/FlatRecord.java
@@ -88,6 +88,10 @@ public byte[] toArray() {
         return arr;
     }
 
+    public long size() {
+        return data.length();
+    }
+
     private Object readPrimaryKeyField(int location, FieldType fieldType) {
         /// assumption: primary key fields are never null
         switch (fieldType) {