So, what would Joan Jett do? Probably smile if she saw you wearing one of these best-selling, 100% cotton hand silk-screened T's. Comes in pInk or red. Please Note: Because the adult sizes of these t-shirts run large, the small and medium shirts below are actually Youth Large (for small) and Youth Xtra-Large (for medium). These youth sizes more closely approximate women's fitted small and medium size tshirts. The Large and Xtra Large are regular adult sizes.