I have a Brother 1500s with a 9" throat on a Little Gracie II frame. The manual that came with it says it will hold up to a 15" throat. I have seen where some people suggest even up to 17". There is only 14" between poles, so that leaves a max of appx 12" work area because the needle does not go to the pole. Not with my machine anyways. And remember the rolled up quilt will take up several inches of that 14" space between poles. Note, the longer throat area, the bigger work area. With my 9" throat, I start with a 6" space. I finnish the quilt with 4-5" of space to work with. This works well for me. I am still learning. I have had my frame for a year now. Enjoy your new toy. I have. - Juki and Janome also have similar machines to the Brother that I have. Bailey has machines that start at 13" then 15" and 17".