That's right, you pick your size and we'll do the rest! We sometimes run single color versions of older Boss Dog designs, and sometimes it's just a random Boss Dog shirt. Which design you get will be a surprise! There is no guarantee of what you get. We promise we won't send you two or more of the same shirt in the same order. We can't promise anything if it's different orders. We also kindly state here that we do not offer refunds or exchanges on Mystery Tees. They are meant to be for FUN.