[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Protocol](https://evolu.dev/docs/api-reference/common/local-first/Protocol) › defaultProtocolMessageMaxSize

```ts
const defaultProtocolMessageMaxSize: number &
  Brand<"Int"> &
  Brand<"Between1000000-100000000">;
```

Defined in: [packages/common/src/local-first/Protocol.ts:310](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Protocol.ts#L310)

Default [ProtocolMessageMaxSize](https://evolu.dev/docs/api-reference/common/local-first/Protocol/variables/ProtocolMessageMaxSize) (1MB).

The standard size used across Evolu implementations. Relays with more
resources can configure larger sizes to reduce roundtrips.