I love my mini wonder clips. What size for binding? I would say that depends on what size binding you prefer. I generally do very narrow binding - 1/4" on each side - so the mini clips work great. If you like wider binding you may prefer the larger clips. I started by buying a small pack, decided I liked them, so bought more. I have enough now to go around a queen size quilt (or several throws) and I plan to buy more.