I started with a medium, which I wear in some brands, but exchanged them for an XL. Those were still too small, and I didn't even think that the largest size available (XXL) would fit so I returned them. Other than that they were very well made, stylish, and were delivered on time. i wish they would have fit...
Road cyclist. Went up a size to get XL (I am 33 in. waist). Fit well around waist and butt however the bottom of the short leg was quite loose around the thighs. Not acceptable fit for a pretty high end short so I returned them. Return handled well. Must be designed for slim Euro dudes with big legs.
The are by far the best bike shorts that I have owned. They are comfortable appear durable. The fabric is a little different than my normal shorts but I like it better. Definitely go one size larger. I am a solid medium in everything else but a large in these.
I am 6 ft. tall, 190 lbs, and have normal body proportions. These shorts run a size too small. They are tight in the legs, but not too tight for cycling. The chamois has a nice feel for extended rides, but I don't think it comes up quite high enough in the front. My main dislike is that it is shorter at the waist than it should be. I have to make sure I wear one of my longer jerseys unless I want my stomach to show.
I have found the Castelli shorts to be far more comfortable than others I have worn. They do run about a size smaller than others. These provide more compression on my legs which helps on longer rides.
Shorts run small, so I sized up one size. Shorts and chamois mold to the body to provide a comfortable ride with full cushioning. Also, the shorts wick sweat away from the body amazingly well...
Good quality bike shorts (and bibs) are hard to find. I am glad I found the Endurance X2 shorts, I have several pairs. I think they are the best no-butt-lube shorts out there. Hopefully they'll keep making them and find and replace them with something better !!
I recently used these for a century ride and they were very comfortable. But they run small. I had to return a Large and re-order an XL when the sizing chart indicated a Large.
I bought a pair of these shorts and then immediately went out and bought another pair of them (bib shorts style). So comfortable on long training rides or centuries. I also like the way I look in these shorts. Better value with comparable comfort to Assos shorts. Unique chamois is the key to the comfort of these shorts. The fit is snug so if you want extra room in the shorts, you may want to order a size larger. I like the snug fit on my legs but others might like it a bit looser.