I really like these sweats, my one problem is the metal ties on the draw string. I removed them because they beat up the fabric and caused it to pill prematurely. Please do not put these on clothes anymore!! Bad idea. :/ Other than that, they fit well. I use them for around the house and sleeping when it is very cold (they are very warm!) so I like them to be slightly lose in the waistband. If you don't, I would say size down. I bought the medium (I'm 117, 5'4") but I'm sure the smalls would fit as well.
Port Angeles, WA