Years ago, I found a bunch of cute, Christmas-themed, tiny clothespins. That's what I use to attach the cards.
It doesn't really matter, though, because I can fit quite a few cards on those ribbons. The early-birds get the best, and most visible, spots though. :)
Speaking of Christmas cards, have you gotten yours ready to send out yet? If not, you may want to check out the adorable holiday cards at Tiny Prints. I used Tiny Prints for my youngest's baby announcement and I think their stuff is super-cute.
Aren't those cards cute?! Check out more of their cards here.
Disclosure: I was given a set of holiday cards from Tiny Prints for this review. All opinions are my own.