Set of 12 generic reply panel cards, postcard weight. The cards are made of 100% post consumer waste recycled fiber, with flat laser printing. Frontside is printed in colored or black ink and backside is blank. They measure 3.5" wide x 4.87" tall. Order these to use as postcards (apply your stamp and address to the back once these arrive at your home) or pair them with a return envelope if you want to add those on to your purchase. Handmade in Seattle, WA with love!