This is the front minus the address. The background started with blends of Twinkling H2O's, then a piece of wall paper border. The gal is painted over a magazine advertising I liked. I just printed it in b&w, glued it in place, covered it in gesso and then painted, using acrylic paints, more H2O's, white gel pen, and some metallic acrylics & glitter glaze. The bird was just a image I've used a lot because I like it! After adding the address & postage I added some flourishes. (which didn't look right and should've been added a couple steps before that).
This is the back of the envelope. It also started with Twinkling H2O's for the background border and then a piece of background print from Altered Bits http://alteredbits.com/free_art.php that I just adore!! The flower is cut and rearranged from another piece of wall paper border, another bird image and the Fairies are from yet another piece of border. Crowns were from Lisa's Altered Art. It all has a touch of glitter for sparkle, of course, and shading. Both sides are glued and protected with Mod Podge, some glue and a final spray of glossy protective finish.
Click on the pictures for a larger size to see it better. The scans never show the pretty sparkle or shimmer.