Notre Dame Fighting Irish NCAA Riddell Hydroskin Authentic Full Size Speed Football Helmet. This helmet is a 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. This officially licensed helmet is not for wear or competitive play. NCAA Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H).