I just bought a 20" x 36" and am already to upgrade to a 36" x 72" except that it is $500. That said - it is worth it. I spend hours at the stove and sink and, being an old broad, it kills my back and my knees. I love to cook and found the small mat for $70 and put it in front of the sink. I love, love, love it and am going to save my $$$ to buy the larger size. It is so much better than any of the other mats I have tried. Having dogs with long nails might be a problem, but it cleans up easily with soap and water.