Seashells At The Sandy Beach,Colorful Seashells Machine Clean Top Fabric & Non-Slip Rubber Backing Durable Indoor / Outdoor Doormat Door Mats Size: 23.6"(L) x 15.7"(W), 3/16" thickness Durable heat-resistant non-woven fabric top Backed with a neoprene rubber non-slip backing Machine-washable Indoor and outdoor use.