The 4×6 postcard is the most popular size in the history of postcards. Club cards, Hand-outs, Quik Info, QR Codes, you name it. These are printed in vibrant color on the front. And guess what? We also print on the back at no extra charge! 16 point is a premium weight and the cards are coated with a high gloss UV coating on the front. UV coating on the back also if you like (that’s also a FREE upgrade for you).