Made from 100% cotton and linen. Well insulated, more absorbent than other silicone or ceramic coasters to protect your tabletop/countertops/bar tops/furniture from being damaged by hot candles. 4.3 inches and 0.4 inches thick, and can easily accommodate your candles but also mugs, coffee mugs, wine glasses, tall glasses, whiskey glasses, soda cans, and even a bottle of wine. Place a paper towel or parchment paper on top of coaster and heat with an iron to remove any wax spills first, then can be washed by hand, dried after rinsing with water and detergent, or washed directly in the dishwasher.