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 a Portfolio in two sizes, the largest measures 4 7/8"w x 7 1/2"h x 1"d (fits A2, A6 and C6 envelopes and cards), sold separately, as well as step by step instructions.