Gray t-shirt from American Apparel with two atoms. Show your science humor! Size small, 24" long and 30" chest (unstretched) Thank you! All my listings are 10% off two, and I offer discounted shipping of $4.99 on *all items* (vs the $8 Poshmark standard shipping). If you're ordering more than one item and would like to combine shipping, I'm happy to squeeze as many pieces as possible into the flat-rate box, so just let me know and I'll set up a special listing with discounts applied.