Adjusting the Size of a Calculated Field

I have a calculated field in a custom form with a text format. When I bring in a single line text field in the custom form, I am given the option to adjust the size to small, medium, or large. However, when I bring in a calculated field, it defaults to the small size and the information displayed from my expression wraps. Is there a way to adjust the size of a calculated field in a custom form?