Mine I think is a little bigger than 14"-I think it is 18". It sits in my lap and I rotate the quilt. I have one on a stand but I'm not all that happy with it because I can't get it close enough to me and sit comfortably.
http://www.quiltingboard.com/main-f1...p-t236783.html
http://www.quiltingboard.com/main-f1...p-t236507.html
Here are some recent discussions we had, which I found with the search function. Good luck in finding one.