[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › Digit1To51

```ts
const Digit1To51: union(
  Digit1To9,
  templateLiteral(union("1", "2", "3", "4"), Digit),
  templateLiteral("5", union("0", "1")),
);
```

Defined in: [packages/common/src/Type.ts:10813](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L10813)

Decimal integer string from `"1"` to `"51"`, without a leading zero.