I would suggest trying one on.
Generally the waist has an elastic section in it, which allows it to fit up to 31". If you're really concerned, go a size bigger and wear a belt.
Lest We Forget
Originally Posted by pancakedestroyer
Watching videos and reading a book means dick all. By that thought process I can read a book on advanced physics and Kung Fu and make rockets that could round-house kick mars