I bought the black 31 x 18 mat. Pros: nice thick leather, quality stitching. Cons: The reasonable production period notwithstanding, the shipping method (DHL) leaves much to be desired in terms of tracking. Measures taken to reduce crinkling: As the mat comes rolled in a tube, I just left it to hang out by its own weight naturally on a shower-curtain rod for a day, then applied some leather conditioner to it, and THEN I laid it out flat gradually (over a few hours). No major protruding wrinkles.