Making envelopes to coordinate with your cards is easy with the Art Philosophy Cricut cartridge.
4 1/4" X 5 1/2 window card page 47 in cricut booklet
5 3/4" envelope page 30 in cricut booklet
B&T Duos: Florentine
Cardstock: Bamboo, Colonial white
Stamps: Pemberley WOTG, Enjoy
Ink: Twilight, Brown Bag, Goldrush, Olive