Walmart use sell June Taylor mats, the best mats in my opinion because they are hard surface. Now Fiskars is the brand sold there. Fiskars is a good self healing mat. Olfa is a good brand of mats found in most quilt shop and craft stores. Tuesday Morning stores usually have the Olfa 36" by 24" mats for $9.99. I buy one each time a new shipment comes in before the clueless employee leans them up against the shelf to sell. No use telling them why that is bad. If the store doesn't shelf them right they get a bend, don't buy one if it is displayed with a curve in it. I have mats on every flat table surface in my sewing room.