Easily create your own envelopes, boxes & bows with the 1-2-3 Punch Board from We R Memory Keepers. This versatile tool allows you to make projects in over 250 different shapes and sizes with a 3-way punch and score system. The score board features a fold out arm with measurements and extended score line. This 9.5" x 12" x 2" package contains; - 1 x score board with a 3-way punch - 1 x scoring tool - 1 x idea book with step by step instructions In addition to the paper size calculator printed on the product We R Memory Keepers also have an online Envelope Generator which will calculate the size of paper required to make custom envelopes.