Happy birthday postcard + envelope 1 card = 3.5 euros Set of 4 cards = 10 euros ☆ I completely create the design of each postcard. - Size: 10.5 x 15 cm. - 1 envelope - Perfect for sending sweet words or putting in a frame. - This set is sent in a plastic sleeve and a heavy duty envelope. ☆ Consider buying several postcards at the same time to reduce shipping costs =)