diff --git a/yarn-project/circuits.js/src/structs/complete_address.test.ts b/yarn-project/circuits.js/src/structs/complete_address.test.ts
index ec45caaa8d9..5a2381605eb 100644
--- a/yarn-project/circuits.js/src/structs/complete_address.test.ts
+++ b/yarn-project/circuits.js/src/structs/complete_address.test.ts
@@ -65,4 +65,9 @@ describe('CompleteAddress', () => {
 
     expect(completeAddressFromComponents.equals(completeAddressFromString)).toBe(true);
   });
+
+  it('has correct size in bytes', () => {
+    const completeAddress = CompleteAddress.random();
+    expect(completeAddress.toBuffer().length).toBe(CompleteAddress.SIZE_IN_BYTES);
+  });
 });
diff --git a/yarn-project/circuits.js/src/structs/complete_address.ts b/yarn-project/circuits.js/src/structs/complete_address.ts
index 5fbd1132e40..a58014ea60c 100644
--- a/yarn-project/circuits.js/src/structs/complete_address.ts
+++ b/yarn-project/circuits.js/src/structs/complete_address.ts
@@ -30,7 +30,7 @@ export class CompleteAddress {
   }
 
   /** Size in bytes of an instance */
-  static readonly SIZE_IN_BYTES = 32 * 4;
+  static readonly SIZE_IN_BYTES = 32 * 10;
 
   static get schema() {
     return hexSchemaFor(CompleteAddress);