I use a muffin top pan, with around 2Tbsp of shredded cheese per crisp. You may want to use a little more or less, depending on the size of your pan (or if you’re just using parchment, how large you want the crisp.
My biggest problem is letting them cook long enough. I’m always worried about overcooking them, but if you don’t cook them enough, they won’t get really crisp.