Mine is either 12 or 14"....I think 12. I love it and use it frequently. I think a rotating mat would be well worth your money, especially if you bought it with coupon. I put my mat on my Xmas list back when I first got back into sewing/quilting several years ago and my dad and step-mom got it for me along with some other items I was asking for. Do you have a birthday or anniv coming up? My DH and kids always know there is probably something I want/need. I think you would like a rotating mat.