No size tag, I believe this to be an XL, please see pictures to make sure it is your size.

This Cabela's Camouflage Octane Button-Down Polyester Collared Shirt is a great addition to any outdoor enthusiast's wardrobe. The long-sleeved shirt features a button closure and spread collar, making it perfect for casual occasions. The shirt is made of high-quality polyester fabric, which can be machine washed for easy care. The shirt's multicolor pattern is perfect for those who love hunting, fishing, and the great outdoors. The shirt is available in a size that is visible in the provided pictures.