Oh my gosh, there are three framelit sets on sale this week - the Envelope Liners, the Squares Collection and the Window Frames Collection. Check them out here.
You require a die cutting and embossing machine to use these - a Cuttlebug, Big Kick or Big Shot. If you don't have such a machine, Stampin' Up! does carry the Big Shot, item #113439.
I had contemplated getting the Envelope Liners framelits but thought them too expensive for their sole purpose. Then when the Envelope Punch Board, item #133774, came out and I discovered you could make envelopes and liners I took the framelits off my wish list. Since then I have discovered other projects you can make with them so now, because they are on sale, I will be ordering them. The other projects are gift card holders, either stand-alone or mounted on or inside a card and stationary folders. Here are a couple of pictures I clipped from YouTube videos (sorry about the quality).
I plan to host a workshop on how to make these fun projects.