We R Memory Punch Boards allow you to DIY your own design solutions for party, correspondence, décor and more. Envelope- Now you can quickly make envelopes, just follow the easy to read chart for sizes from 2"x 3.5" to 6"x 8.5", 66 different sizes in total. It's just a matter of punching and scoring. Punch portion creates both the fold tabs and rounds corners. Board measures about 10.5"x 7.25" and comes with a bone folder that slides into the side with not in use.