You get to decide what to put on these coasters. Family photos, dog photos, child's artwork, business logo, specific design, you name it! Leave us your email address, we'll reach out to you for photos! CERAMIC- man-made product that starts off bright white for a less rustic looking coaster. Smooth and all are alike. *For quicker processing time, please have your images cropped square. Set of 4, each coaster has a full 3.5" x 3.5" cork backing. Each coaster is 4.25" x 4.25". The image is transferred to ceramic tile and has a smooth surface. These are not absorbent. These are not dishwasher safe and should be wiped clean with a damp cloth. Since each tile is made of natural travertine stone, no 2 will be alike. There may be slight abnormalities that make each coaster unique in their own way. Some will have more divots/holes than others. Some may not be perfectly square, nor exactly 4 inches.