Under Armour Boys Mock Neck Coldgear Shirt Black w/ Red Size Large

For your consideration is a boys Under Armour Coldgear shirt. It is black with red accents and white stitching. There is not a size tag. I am estimating it is a size large, possibly a medium. I would guess large as I held it up to another Under Armour Boys XL that I am also selling and it is just slightly smaller than that UA shirt. The shirt is 21" long and 10" wide. I am sorry I cannot verify the exact size! Quick shipment from a smoke-free and pet-free home.