I was looking for bib shorts which are longer than usual shorts. This fit my need perfectly. I usually wear a M in castelli and ordered a M but it's slightly too snug. I still wear them but it's a little bit difficult to get in and out. Usually let bands in most shorts feel very tight for me and I'm this shirts it is not constrictive while riding! Love the chamois. It is the best shorts i have and my go to shorts for 100+ mile rides.