I second the ones from Sew Steady. I luv's them. I have multiple ones in different sizes and sets as well as single ones, and after a short practice on one practice block (made a pot holder for practice block) I was good to go! I have done full quilts with them. You do need a foot to go with them, but the Sew Steady sight gives you the information you need when you put in what quilting ruler you want. It asks you what your machine is, etc! I really really love their site and products! Their quilting rulers are excellent and there are tutorials as well for them!