I am 5'5 130lbs and a Medium fits perfectly. They come about 2 inches above my ankle, brilliant for running, and I can comfortably wear these without worry about people seeing my underwear. With most other brands I wear a Small but I have found with Sam's leggings I am a Medium. My only wish is that they were a bit longer- covered my ankles for trail running-to protecting them against bugs and rubbing up against random plants but that is very specific to me. I do recommend despite my previous comment since the quality is great and price is fantastic!

Nice quality and good fit

Nice fit. Good length, actually goes to the calf, not just below the knee.

Very soft, comfortable and fit true to size

Love the fabric! Good fit, I'm a size 12 and got a large and they fit well!

Comfortable fit & stretch

awesome fit, quality and value

The waist is annoying as it constantly rolls down .

I bought 2 sizes up and they were still too small.

The material feels good. Runs a little small. I had to size up.