I was like Patrick, why no small? I decided I would just order a Medium and wear it for working around the place. (It is my favorite shirt, but I really do need a small or perhaps an extra small.) It is by far one of my softest, most comfortable t-shirt (short or long sleeve). As for the sizing, it does seem to run true to size. It's not tapered or fitted in nature, but a classic t-shirt fit. I hope they are back in stock soon, and perhaps with additional sizes.
Wish i could purchase this, but there is no small.