H&M button down long sleeve shirt, hemmed to be worn untucked. It is a size small but is pretty tight, could be mistaken for an extra small. it used to fit but I've either gotten bigger from working out, or bigger from sitting on my @ss! haha! I'm guessing it's the latter! my loss is your gain! pick any of my the items that say "3 for $10" and I'll accept the offer of 10 bucks for all 3.