Based on the first few rides with my first pair, I purchased a second pair. Enough said!! Generally, with a waist that measures between 32 and 33, my sizing can be either medium or large. The large fits perfectly, probably due to the bib's compression. The padding is perfect: neither too thick nor too thin. The final factor in my rating is that I used these while riding the Steamboat Springs 60-mile ride with no chafing, just a little dab of chamois butter. My only negative is that I wish Black Bib went tagless. Not a deal breaker.