Create a unique coaster with this photo upload design. Decide whether to make & buy either a single coaster a pack of six or any number in between. You can either choose the same photo for each coaster or you can choose completely different photos to create a unique set. Use our editor to improve & position your photos so your coasters look just how you want them. A rounded square shape all coasters are made out of a quality hardboard material which has a diameter of 9 x 9cm (3.5) & a high gloss finish.