So, two sets of thank you cards. The first was for Decagon Devices, Inc. The initial project was for three different cards, which accounts for the number of concepts here (as much as I like Decagon, it's unlikely I would do twelve different concepts for a single card). However, in the end we moved ahead with only one of them (top row, second from the left). The set after is (as you could probably have surmised without the color commentary) variations on the design they picked.