Oregon Ducks Riddell Speed Replica Full Size NCAA Helmet. This full size Oregon 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. This officially licensed NCAA helmet is great for autographs and features Oregon team logo decals on both sides. NCAA Oregon Ducks Riddell Speed Replica Full Size Football helmet size medium measures: 12.75"(L), 9.25"(W), 9.75"(H) (NOT FOR WEARING)