Seattle Seahawks Riddell Speed Throwback 83-01 Replica Full Size Football Helmet. This full size Seattle Seahawks helmet is designed with a non-wear plate and molded foam jaw pads. a steel polyvinyl-coated face mask, 4-pt chin strap, and elliptical air vents. The officially licensed NFL Seattle Seahawks helmet is great for autographs and features Seahawks team logo decals on both sides. The striking shape of the game! NFL Seattle Seahawks Replica Speed helmet size medium measures: 12.75"(L), 9.25"(W), 9.75"(H). NFL Seattle Seahawks Full Size Speed Replica Helmet. (NOT FOR WEARING)