I bought this as a joke tshirt for my husband - we both love the Big Bang Theory and I thought he would get a good laugh out it since we use this term all the time, but actually, it's his favorite shirt to sleep in.  He no longer has to say the word, just points at his shirt.  I bought it on the larger side, which is perfect for him to sleep, so I would say its true to size.  The item arrived quickly and just perfect.  I would order from this seller again!