At our Oct 19 BUG jam we had T-shirt sample sizes and a sign-up sheet.
Mark will be putting in an order this Monday, Oct 24 so there's still
an opportunity to order one and take advantage of the bulk order price
(unisex)

Sizes S to XL are $15
Sizes 2XL to 5XL are $19

To give you an idea of the size: small just fits me (a bit snug