I adore the look of a handcrafted card with a coordinating envelope (stay tuned for the matching card). TIP: Using some Au Chocolate polka dot designer series paper (retired, but any polka dot pattern will do) and a Pretty in Pink Stampin' Up! marker to color in the ivory dots, I created a custom pink and brown envelope flap.
The designer paper was adhered to the flap and then flipped over to expose the leftover paper. Using a Stampin' Up! hobby blade and cutting mat (click for sale starting May 1), I cut off the excess. 
I added a Pretty in Pink flower from the Big Pieces stamp set to Whisper White card stock. TIP: I cropped it with a 1 1/4" Circle Punch and matted it on a 1 3/8" Pretty in Pink circle for a "crafty" envelope seal.
Hugs and Pretties . . . Mary
Stamp Set: Big Pieces
Paper: Whisper White, Pretty in Pink, Au Chocolat Designer Series Paper, Whisper White Envelope
Ink: Pretty in Pink Marker and Ink Pad
Cool Tools: Sanding Blocks (to scuff unused flower stamp), 1 1/4" and 1 3/8" Circle Punches, Cutting Mat and Hobby Blade
It is so nice to see cards made from these stamps, many times we see stamps and don’t think we can do anything with them, until we see these beautiful card’s.
thanks
Cool! Another great use for my craft knife. I’ve slipped pp inside the fold, but love the option of this look! I struggle with putting a card I’ve just “created” into a plain envelope. Not that I want to spend another 30 minutes cutting out my own, either. Great idea!