Questions and Answers for Amphibious Outfitters Your Time´s Up T-Shirt:
Size chart for T Shirts ?
Darrick (Certified Scuba Instructor at Scuba.com)
Hello Eric, here is the phone number to A/O (716) 772-5445. for some reason they do not post a sizing in either there catalog or on there website. But they are standard tee shirts sizes so if you wear a size medium then you would be a size small. If you have any questions on sizes just give the manufacture a call.