The Kreate-a-Box Templates from Green Sneakers make the most usable, unique, and versatile boxes in the world and are designed for 12" x 12" papers to get the largest sizes possible. Each package includes one template that makes three sizes of Popcorn Boxes and step by step instructions. Make usable boxes ranging from 8" x 8" opening, 4" x 4" base x 6 1/4"h to 6 1/4" x 6 1/4" opening, 4" x 4" base x 4"h and these boxes are nestable.