Kansas Jayhawks Authentic Speed Football Helmet. his full size Kansas Jayhawks matte green 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 Kansas Jayhawks helmet is great for autographs and features Kansas Jayhawks team logo decals on both sides. The striking shape of the future. NCAA Kansas Jayhawks Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H). NCAA Kansas Jayhawks Full Size Helmet.