so i got a medium which is my regular size.. it fit just a tad bit loose but nothing too big.. i also don’t really like that it’s ribbed but i didn’t find another one so this will have to do.. it’s still pretty comfy and nice.. will not go up and expose you boobs if you lift your arms lol.. that was a worry since it’s cropped right below your boobs.. 5ft 130lbs 34C