I learned this a few years back from a SU demonstrator and it is one of my favouritest and quick cards to make. Sooo easy as well.
Cardstock base 4.25x5.5 inches (you are going to want a fairly heavy weight)
Coordinating Cardstock 4x5.25 inches
Length of organdy ribbon (you could use any ribbon, of course, organdy just ties and unties nice)
standard envelope from the office supply section
Stamps, Ink or other embellishments (this stamp set is Beauty of Winter by Close to My Heart, it is retired as they love to do to my favourites!)
1. Adhere coordinating cardstock onto cardstock base and then attach ribbon with adhesive, centering it on the coordinating cardstock.
2. Fold envelope in half and decorate front. (Shoudl open like regular card). Then attach to coordinating cardstock over the ribbon.
You can also decorate the inside of the card if you want or add a sentiment
3. Insert your money or gift card and close the envie, tie the bow and you are all set to go!