Neurons Not Included Funny Science Coaster Set - Lab Rules - 6 Piece Set - Neoprene Neoprene Set of 6 individual - 3.75 inch - square -neoprene coasters Fabric top- safe to spot clean with mild detergent Non-slip recycled rubber back protects helps furniture Ships in drawstring gift bag for storage Printed in USA in our Neurons Not Included studio