This sponsored post was live on Tombow's blog previously. Affiliate links included. How to Fold an Envelope with Double Sided Paper! Learn how to fold cute paper envelopes and matching cards using double sided paper. These cute cards can be sent through the mail and brighten the day of the recipient! You can make these A2 envelopes out of things you already have, like magazine pages or cereal boxes. A2 is the standard size for a half sheet of paper folded in half (or a quarter sheet). Knowing how to fold an A2 envelope is a great skill for all those last minute gifts, greeting cards, party invitations or fun mail just because. Echo Park has a fabulous line of patterned papers. They are double sided and perfect for card and envelope making. This Little Lumberjack Collection Kit is absolutely adorable. Supplies Needed for Folding Envelope: Double sided paper MONO Adhesive + Permanent Scoring tool (I used my Cricut Tool) MONO Graph Mechanical Pencil ...