I have made lots of yo-yo's and you can get uniform circles cut by a quilt shop that has an "accucut" machine for a small fee and it is really easy to turn under a small hem to gather-do not make the stitches to short that leaves a bigger center hole. Use hand quilting thread and lock the knot on the inside of the hem so it will not show. After stitching all the way around I extend past the starting point and draw up the thread, then stitch a couple of times in the opposite direction before tying the knot to the inside. Hope this helps. Moosegirl