5'7" 126lbs. Size small. I wear these under bibs for rides of 100K or longer. The smooth chamois provides just enough extra padding to provide relief to the sit bone area, and so far has prevented saddle sores. Makes long rides much more comfortable. Just bought a 2nd pair.
I've tried a number of different liner shorts & this one is excellent. It fits nicely under jeans but can also be used effectively with tights in different combinations. Not too expensive and a good combination of comfort and flexibility.
This is my first pair of Chamois shorts and they are quite great. $40 for chamois underwear seems a bit stiff, but after shopping around a bit, it's really not bad.
I'm a deluxe sized rider and I ordered the 2XL. Per the sizing guide, a L should have fit me, however, I know my thighs are pretty large, so I ordered 2XL. It fits pretty well, and feels great. Don't go by the waist sizing. Order something you know is big enough. Being oversized doesn't seem to be a problem, except that maybe you have to pull them up more.
I use this liner on my commuter. The chamois pad is not too huge but for my commute mileage of 10 miles, it is fine. Probably not the liner you'd want for longer mileage rides, but lightweight and quick-drying, which is helpful for a commuter. They are a bit shorter in the leg than others I've had, but that's fine because I mostly use them under a commuter pant. Not sure on the durability yet, since I've only had them a few weeks. No issues so far though.
These liner shorts work as intended to allow comfortable biking while wearing more civilized looking walking shorts.
Pearl Izumi makes quality stuff. Size Small fits my 30-31 inch waist well though snugly, and the chamois worked OK to smooth MTB impacts on a rough dirt road. Whether the chamois would work well enough (compared to a real bike short chamois) on a rougher MTB trail is uncertain.
Have purchased a number of liners over the years. To me, this is the best. Great support and comfort. If one follows the directions; washes beautifully. Keeps its integrity and support.
I don't often wear padded bike shorts. These liners offer flexibility in the shorts worn riding. They work well. The latest pair has a different colored chamois...don't know if it is better, worse, or same in quality...i guess i'll ride more and find out.
Pearl Izumi's update to the leg in this Men's Select Liner Short is really noticeable! It has provided a more comfortable ride that previous models! I actually am in the process of replacing ALL my liner shorts because of this comfort improvement