The Lettermate is an address stencil that keeps your writing straight and aligned, as well as letting you decorate your envelopes with hand-drawn designs.
Free printable mini envelope template. I make mine out of old calendars. You can just eyeball it because you have to adjust to get the prettiest part of the picture where you want it.
Sarah Pinyan posted How to make envelopes from scrapbook paper, wallpaper samples, and other pretty paper. to her -Papercraft- postboard via the Juxtapost bookmarklet.
Promo & invitation card by Sarah Thorne Graphic Design for Mulberry AW11 / <3how-to
watercolor envelope calligraphy | a fabulous fête (via @Mindy Burton Burton Burton Burton gayer)
Custom Envelope Addressing - The Avery… if only I had that much time and was that creative!
Vintage Lace letterpress wedding invitation - diy - glue lace to invite and paint over lace and card.
The 11 Prettiest NYFW Invites Of The Season