Made to order! What ever size you want. A bit pricey but I think well worth the money. My cutting table is 7 ft long and I have to butt two mats together sometimes. Joanns and other stores have a mat that is about 59x36 but I need bigger to cover my entire top. And get this, this order to size mat is self healing! You can order one here
No I'm not affiliated with this company in anyway, just an obsessive surfer of quilting ideas.