Things You'll Need:
If your are using an envelope you already have as your template, carefully take it apart. You want it intact to trace, so try not to rip it on the edges.
Lay your envelope template on the backside of the calendar and trace. Play with the positioning a bit to try to get the best parts of the photo in the center of your envelope.
Cut out your envelope design using your template. Be careful to trace and cut accurately because if it is uneven the envelope won't lay flat or seal properly.
Fold in the sides and bottom of the envelope, then crease the top. For this project a bone folder was used to make the creases sharp and even.
Glue (or tape) the bottom flap over the two side flaps. Leave the top flap unglued.
Your envelope is complete. Since this doesn't have the adhesive on the top flap you will need to glue or tape the top down when you have put your letter inside. For a finishing touch, add some glitter stickers or decorative washi tape.
(This tutorial and images are by Susie Delaney, eHow contributor)
PS: if you like this post, please click on one - or all - of the links below. Thank you!