These were made for the Technique Lover's Challenge (TLC171) posted on Split Coast Stampers. The challenge was to create several 3X3 cards, matching envelopes, and a cute box to store them in.
It took me a while to complete this set, but I LOVE how it turned out.
Unfortunately, I read another post stating that these cannot be mailed through the U.S. Postal System. I guess they are too small? Hmmmmmmm!