These look and feel good, and don't ride down (yay!). I took advice of reviewers and went up in size from what I might have done. I'm 5'7" and 117 pounds, normal size is XS or S in clothes (size 2-6 depending on cut/style)  and yet I got large/extra large and am glad I did - there is a size chart on the back that confirms that was right choice.