Easily customize your own promotional advertising, product instructions, thank you cards, and other postcards for mailing using Avery Design & Print Online and available templates Each sheet of printable cardstock features proprietary Sure Feed technology that delivers a more reliable feed through your inkjet printer to reduce misalignments and jams Enjoy a clean, professional finish from the micro-perforated design that allows for easy separation and a smooth border around each postcard Print beautiful, double-sided designs all the way to the edges of the card; postcard paper is made from sturdy, matte-coated cardstock has a weight of 80 lbs / 216 gsm Item includes 50 printable 8.5" x 11" sheets with a total of 100 blank 4" x 6" rectangle cards (two per sheet) that meet U.S. postal regulations for postcards; just address, stamp, and mail-no envelope required!