One 6"x6" wrap: good for jars and cans. One 9"x9" wrap: good for bowls, snacks, and sandwiches. One 11"x11" wrap: good for sandwiches, bread, large bowls.
Use the heat of your hands to mold wrap around a casserole, a bowl, bread, sandwich, etc. Wash with cold water and soap, then air dry. Use again and again.