"Why So Serious"? Doesn't your city deserve a better class of criminal? Give them one with this colorful Joker costume t-shirt. Now just slap on some makeup and you'll be ready to have a seriously good time this Halloween. This black, standard fit t-shirt is composed of 100% cotton. Be sure to check out our Size Chart to get an idea of the average size and dimensions of this Joker costume tshirt style. Check back often for some of our new Joker clothing and other Joker Merchandise at great prices only at AnimationShops.com.