MaxLength Property
Qubes 5.6 Defines the maximum size of a text box or field, introduced in Qubes 5.6.
The size is expressed in https://en.wikipedia.org/wiki/UTF-16 characters, and so is only the same as the size in code points for characters in the Basic Multilingual Plane. The BMP includes nearly all of the characters used in modern languages, but does not, for example, include all of the existing Chinese characters.
Note: If the limitation relates to database storage, remember that the size of a database string will depend on the encoding used by that database and may, therefore, differ from the size expressed in UTF-16.