NSV-more SMALLs are sneaking into my closet
Wow! XS.
I had a similar experience in going from 2X straight to medium with gym clothes. The manager pulled me aside and told me my clothes were too big. Way to big. Getting dangerous on machines kind of big. Consider a shopping trip.
And when I went and could wear mediums...I thought the store must have a problem with sizing or spandex had gotten more stretchy since I last wore it!

RNY Surgery: 12/31/2013;
Current weight (2/27/2015) 139lbs, ~14% body fat