[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<"NonNaN"> &
  Brand<"Finite"> &
  Brand<"Int"> &
  Brand<"Between1000000-100000000">;
```

Defined in: [packages/common/src/local-first/Protocol.ts:358](https://github.com/evoluhq/evolu/blob/113517df8a8da4e4eed41363077878e657b22fca/packages/common/src/local-first/Protocol.ts#L358)

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

The standard size used across Evolu implementations. Clients send at most
this size, and relays accept it. Relays with more resources can answer with
larger messages to reduce roundtrips.