Bluetime Men's Short Sleeve Button Up Flannel Plaid Shirt (Yellow) The sizes runs small, pls choose ONE Size Up. S=US XS ,M=US S, L=US M, XL=US L, XXL=US XL, 3XL=US XXL Short sleeve button down shirts featuring chest pocket Straight casual fit plaid checked shirt, standard thickness turn down collar Many colors provided, nice quality, making you feel well in usual casual wear or office wear Soft and smooth fabric, graceful style