I googled "rotating cutting mat" and found a Martelli 16" round mat for $27.19 at Staples.com. Michaels and JoAnns.com both had Olfa and Fiskars 8x8" (around $15) and 12-1/2 x 12-1/2" (around $35). I have the 8x8, and it is great for trimming HSTs and would work well for cutting pieces with small templates. Also, if weighs almost nothing and I take it to classes and retreats just in case it might come in handy. I have seen the Martellis demonstrated at the Houston Quilt Festival, and they are very well built.