Snuggle up with a Glo Worm grey tee shirt! Incorporate a childhood favorite into your wardrobe to create various geek chic and comfy outfits. Tee shirt is in unisex sizes: XS, SM, MD, LG, XL, 2X and 3X. 100% Cotton. Please note: We are not able to exchange sizes or offer replacements for apparel that was sent in the size ordered.