Hi, I'm Robin, and welcome to my wonderful world of WhichKraft! Thank you for visiting my store and checking out my "Let the Good Times Roll" Natural Slate Coasters! These engraved natural slate coasters are a perfect addition to your home decor. It makes for a beautiful birthday, housewarming, holiday, or wedding gift! Laissez les bon temp rouler- Let the good times roll! Each coaster is made-to-order, measuring 4" by 4" in natural black slate. Four foot pads are adhered to each coaster's bottom to protect your furniture. The coasters are waterproofed and sealed, ensuring long-lasting use. Wipe them down with a damp cloth to clean them. However, please remember that the coasters are NOT dishwasher safe and cannot be submerged in water. As each coaster is engraved and sealed on the same day you order, please allow 3-5 working days to ensure quality. Natural slate is stone and may have variations, but I promise to check each coaster's quality before fulfilling any order. Thank you for considering my "Let the Good Times Roll" natural slate coasters, and I look forward to serving you soon!