4"x4" set of 4 coasters. These are created from 1/4" MDF with resin art. After the resin art is cured they receive a final clear coat of resin which locks in the colors and gives a water and stain resistant coating. The back side has cork to protect your furniture and each one has our logo burned into the cork. No two are identical. There will be slight differences in each because resin continues to move for hours after it is poured and has a "mind of its own".