Son normally wears a size 30 pants. I purchased the small & medium belt to compare. The small fit on the next to last belt hole next to the buckle (almost too small), but the medium belt fit on the next to the last hole farthest away from the buckle (almost too big). We'll keep the medium to have room to grow, but I would have preferred a belt that fit somewhere in-between.

My husband is super fussy about certain items, belts being one of them. But he loves this one! He finds that the belt stretches so its comfortable when he sits or stands, etc. He also likes that it's reversible to be either black or brown.