[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › sahPoolHeaderSize

```ts
const sahPoolHeaderSize: 4096 = 4096;
```

Defined in: [packages/sqlite-wasm/src/SahPool.ts:1261](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/SahPool.ts#L1261)

The size of a slot's header, where the file's data starts.