I have several (at the time I didn't realize one could be used for various patterns). I find that I am always grabbing a larger one. It allows me to cut many different sizes but it is easier (for me) to hold and maneuver. I love making dresdens and versions of them. Two things to remember - your 1/4 seams are very important and sew the blades together starting at the outer edge. If the are uneven in the center that will be covered by the center circle or bias trim if you do it as a tree skirt. Hope you have as much fun making them as I do.