Purchased from Title9, Carve Designs brand, navy and white stripe From the T9 website: Paddle-ready protection that stands up to the sun, keeping us comfortably covered in every venture. Adjustable, side ruching allows for custom length. 1/2 zip. By Carve Designs. S(4-6), M(8-10), L(12), XL(14). Body-skimming fit 82% nylon/18% spandex, UPF 50 Carve Designs Dawson Rashguard *Reviews I read recommended sizing up, so I did and it was a very loose fit, which was OK but I've decided to find it a new home and get a smaller size. 19.5" from pit to pit. Very stretchy material