MLB Jersey Sizing Guide
Chest sizes Small - 34-36", Medium - 38-40", Large - 42-44", XL - 46-48", XXL - 50-52"
Generally, these jerseys are designed to be worn baggy. If you didn't know this or are unsure, here are the approximate actual sizes. [It is worth measuring one of your own shirts as a guide as your shirt may be larger than you would have expected]. We are happy to exchange, but if you follow these guidelines it makes it easier for everyone. 'UA' is the jersey laid flat on a table and measured under arm to under arm. The 'back' is the length of the back of the jersey from the nape of the neck to the bottom of the hem;
Small: UA approx 20" / back is approx 30"
Medium: UA is approx 22" / back is approx 30"
Large: UA is approx 23.5" / back is approx 31"
XL: UA is approx 25.5" / back is approx 31"
XXL: UA is approx 28" / back is approx 32"