I have the white plastic snap together square about 12". I really like this because I felt with the round one I was constantly rehooping and had a lot of already quilted area in my hoop. With a square you don't get that as much. I also made sleeves to go on 2 sides so when I get to the edge or the corner, I just pin the quilt to these sleeves and I can quilt all the way to the edge. It pulls apart and I can carry it along very easily. If the quilt get loose, I just roll the clips to the back and it's tighter.