I could probably just make this a Star Wars blog...

"You, too, can be one with the Force & let everyone know how you feel about your Jedi friends with these postcards.

Each card is printed onto glossy-surface front/matte back 120 lb post consumer recycled cardstock with colour and black ink, with rounded corners.

Dont use em all at once, we know ya wanna!"

Found at NerdNook's Etsy shop.