ceramic tile coasters, 4-square 4x4inch tiles, some sets use fluid acrylic mixed paint mediums,& some alcohol inks, both are sealed with multiple layers of a 2 part table top quality epoxy resin coating on top for durability & heat resistance. Each coaster has a square cork bottom with my logo. These coasters take lots of attention to detail and each one is a mini work of art in itself. Each coaster is beautifully unique, created by me personally in my home studio with great attention to detail given. Please enjoy & send feedback my way with a review on my fb page.