Clemson Tigers Authentic Speed Football Helmet. Perfect item for autographs and collectors. This full size Clemson Tigers 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 officially licensed Clemson Tigers helmet is great for autographs and features Clemson Tigers team logo decals on both sides. The striking shape of the future. NCAA Clemson Tigers Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H). NCAA Clemson Tigers Full Size Helmet.