2Katty2: Good question! Under arms I measured approx. 40" unstretched and since its stretchy-like cotton can probably stretch up to or under 50" chest. I hope that helps!
That is wonderful not just one way measurment but 2 way measurement... I am a hard to fit size so it really helps to get that much info when I ask for a measurement... I am glad that I asked. I will be watching this item and bidding if the bidding doesn't get to high at the end...