Full Size Authentic Speed NFL Helmet by Riddell. 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. NFL Team name on back bumper. The officially licensed helmet is great for autographs and features Cardinals team logo decals on both sides. The striking shape of the future. The Authentic Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H).