Set of Four Spider Web Placemats Halloween Add some dinnertime drama or dress up the sideboard with a set of four black felt spider web placemats. Each divine design is cut in the shape of a classic web, complete with two spider silhouettes. They're the perfect way to dress up the tabletop, on top of a tablecloth, or alone. Cut from 5 mm thick black wool felt. 15" dia. x 5 mm thick, each.