I used Hero Arts Leafy Vine stamp, silver Staz-On ink and lavender envelopes. Then I stapled silver cardstock and glitter cardstock flags to the top. Easy! I use an envelope board for creasing and a little adhesive on the folded flaps on the bottom.
You can add phrases or initials or whatever you like to personalize each one. These would make place settings at the holidays with holiday colors.
Here's a how-to video (not mine) if you need clarification on how to do this. These are small because I used a smaller envelope, but just think—you could make a large one from a 9x12 manila envelope. That'd be fun for a gift!