Get the JAM Paper 5" x 7" City Through the Trees Blank Cards & Matching Envelopes Set, 25ct. at Michaels.com. Christmas card sets with blank insides to write on, draw on, or decorate on! If you're the creative type who loves to write messages or decorate the inside of your cards, then these card sets are perfect for you. You can personalize these cards to be as custom as you want!