I ordred a pair of Oakley bike shorts (nylon type shorts with chamois liner) from SAC a few years ago. They ran HUGE. I ordered a large (I'm usually a large in bottoms that are not stretchy) and I could pull them off my generous hips and butt. Literally.

I gave them to my husband and they fit him great even though they were women's shorts (he ended up not liking the chamois). My husband is 5'10" and 185. Of course, that could be why they made it to SAC in the first place. I've not tried any other types of their clothing.