Currently you can restrict text and text area fields field length in approval documents however not for numeric fields. Some information for which you use numeric fields (e.g. a supplier reference number, identification numbers, ..) however have a certain maximum or a dedicated length. So it would be helpful to restrict also this field length.

P.S.: The current setting for numeric field is to show decimals even if not needed. If in the settings you could set, whether the value requires decimals or not it would be nice to have.