I use the pvc pipe hoop, that I bought from Joann's...I think it is about 14". I absolutely love it, I can make it as tight or as loose as I want, and it takes up little room when we travel...I do have several wooden hoops, but I don't find they are as easy to use as this one....and the upside: not expensive. The wooden ones are over $100. I have quilted small wall quilts up to queen size. I currently started a whole cloth quilt yesterday, a queen. Sometimes it is clumsy, but I like it. I just posted 3 UFO finished quilts, and each was quilted on this hoop from Joann's.