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