155cm, medium flex, true twin, progressive sidecut. The result is a perfect medium board, all around and in the park, butters and ollies awesome. I color matched the base with some sick blue/white Union bindings I've been rocking a few years, badass center stranced freeride setup. I highly recommend this board, but am blow away at the price. I got my Westmark at 52.5% off, with warrantee, tax included and delivered. Babied it all season long, hopefully use it a few seasons past the expiration of the warrantee. Sick DECK!