4 WWF 18" Mylar Balloons - 2 The Rock and 2 Stone Cold 4 classic WWF foil balloons. - 2 Stone Cold and 2 of The Rock Balloons are single sided. - Great image on one side, blank silver on the back. Balloons are self sealing and can be filled with helium or air. These balloons measure approx. 18 inches. Ideal for the WWF WWE fan or Wrestling theme party.