I've seen this brand before and keep reading 'runs smaller than other brands' or something, but when I ordered the medium (I'm usu a xsmall-small, like at the gap), it was obviously too big - as in, couldn't make it work, the tailoring fit funny. So I ordered my usu and was happy with the small. I'm 5'2", avg build, wasn't so mini on me but I like that, don't like muscular quads showing all the time!