[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › [c-api](https://evolu.dev/docs/api-reference/sqlite-wasm/c-api) › sqlite3\_msize

```ts
function sqlite3_msize(
  deps: SqliteWasmDep,
): (ptr: 0 | SqliteOwnedPtr) => bigint;
```

Defined in: [packages/sqlite-wasm/src/CApi.ts:1108](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/CApi.ts#L1108)

Returns the usable byte size of memory from [sqlite3\_malloc](https://evolu.dev/docs/api-reference/sqlite-wasm/c-api/functions/sqlite3_malloc),
[sqlite3\_realloc](https://evolu.dev/docs/api-reference/sqlite-wasm/c-api/functions/sqlite3_realloc) or their 64-bit variants, which can exceed the
requested size, or 0 for NULL.

Wasm type `j(i)`. Signature `["sqlite3_msize", "i64", "*"]` from SQLite's
table.

See https://sqlite.org/c3ref/free.html.