Length/size allowed by OFS for a Custom Property type 'string'

Summary:

**This post was created as part of a How to Service Request (SR)

Content (required):

Im trying to update a custom property through API, what is the length/size allowed for a Custom Property type string?  

Version (include the version you are using, if applicable):

22.B.1

Code Snippet (add any code snippets that support your topic, if applicable):