I made these invitations for a baby shower I'm throwing this month for a friend. I copied the idea from a birth announcement my friend Heather sent a couple of years ago for her boy. I used Stampin' Up cardstock because I can coordinate their colors to their ink pads. I used Stampin' Up stamps on the card and the front of each envelope. On the inside, I mounted a pink square with the invitation details printed in brown. They even had a cute $0.57 cent stamp that was pink. I love to put fun or coordinating stamps on mail.
Here's the birth announcement Heather made that inspired the idea: