You change the size of a single field by modifying the
width value for that field in the presentation.xml file.
You can also define a range of values for a data type in the field-size-config.xml file.
Specifying size ranges for data types
You control the size range of a data type in the user interface
by modifying the value in the field-size-config.xml file.
The size of a field in the user interface depends on a setting for
each data type and the length of the column in the database. This
dependency creates a uniform appearance in the UI when fields of different
lengths are beside or on top of each other in the same section.