Threadrock Big Boys' Wee Irish Hooligan Youth T-Shirt Threadrock exclusive Runs slightly small; consider going a size up Sizing: XS (2/4), S (6/8), M (10/12), L (14/16), XL (18/20) 100% preshrunk cotton; seamless rib knit collar; taped neck and shoulders; double-needle hemmed bottom and sleeves