How can I increase the size of a baseball cap?

Question

My mom recently bought a baseball cap for me but the problem is that it fits my head, but it's a little too tight. I think that if I keep on using the cap, it will eventually expand.

Does anybody know how to stretch the cap without me having to use it?

Answer 1

One option would be to put something like a soccer ball or basket ball inside the cap. Let the air out of the ball, pull the brim of the cap over the ball then inflate it again to put a constant pressure on the brim to stretch it a little.