These coasters are designed for the cup holder space in your car, although they can be used on any surface, including cars, kitchens, bedrooms, cafes, etc. for placing coffee cups, wine cups, tea cups and glass bottles. They are 2.75" round, .4" thick neoprene, similar to a mousepad. The design is printed with non-smear, permanent sublimation ink, then heat transferred to the coaster for a permanent print. The absorbent edges protect your vehicle interior from drink condensation. Hand wash, air dry.