This Goodie Two Sleeves T-Shirt is guaranteed authentic. It's crafted with 100% Cotton. Product Attributes: Age Gender : Mens Apparel Material : 100% Cotton Regional Size Classification : US Color Class : BLACK Size Modifier : Regular Fit Type : Regular Measurements For size Medium: Chest: 20" Length: 29" Chest measurements are taken from armpit to armpit. Length measurements are taken from top of shoulder by collar to bottom. Item # 74