Authentic Speed Football Helmet. Perfect item for autographs and collectors. This full size helmet is designed with extended mandible (jaw area) protection, a steel polyvinyl-coated face mask, chin strap, increased padding, an integrated facemask attachment system and elliptical air vents. NCAA Team name on back bumper. The helmet is great for autographs and features logo decals on both sides. The striking shape of the future. Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H).Full Size Helmet.