I'm selling this because I couldn't keep up with my nephew's growth and can no longer wear it. If anyone needs it, I'm happy to give it away. The size is listed as 3XL (4L), but please refer to the tag on the button in the second photo and the size chart in the third photo. It has not been opened. This is a wrinkle-resistant shirt made of a polyester and cotton blend. - Model Name: TS77L Long Sleeve - Size: 180B - Material: 65% Polyester, 35% Cotton - Features: Wrinkle-resistant shirt Thank you for looking.