The DIY Craft Coaster Pack by SJT includes 6 blank white absorbent stone coasters perfect for decorating. Each coaster measures 4" x 4". Create your own coaster designs with your own artwork using permanent markers (not included). These coasters make great arts and craft projects for kids, parents, grandparents, art teachers and more. Great for family craft night! Do-it-yourself coasters make unique gifts for mom, dad, grandma, grandpa, siblings, friends, teachers, etc. that they are sure to cherish forever. Unlike tile coasters, this absorbent stone is made of clay. Absorbent stone helps to absorb drips, spills and condensation. It is strongly encouraged to use permanent markers when designing your coasters. Materials such as acrylic paints can seal the stone side of the coaster and hinder its absorption ability. Cork backing ensure coasters won't damage your furniture, counter or desk. The cork also keeps the coasters in place when you are using them to place a drink on. These coasters are made in China and are packaged in the USA! Contains 6 blank white coasters. Each coaster measures 4 x 4 inches!