Postcrossing From New York! Cards are 6 x 4 Matte finish - not shiny! Heavy Cardstock Handwritten notes are a dying art but never have they been so important. It is so easy to reach out to someone via text, but it takes a special thought to take the time to write a letter and send it to someone. And EVERYONE loves to get (good) mail! Many options available: Single Pack of 5 Pack of 10 Pack of 20 Pack of 50.