Arizona State Sun Devils FLASH Full Size Authentic Revolution Speed NCAA Helmet by Riddell. This full size Arizona State Sun Devils 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. The officially licensed Arizona State Sun Devils helmet is great for autographs and features Arizona State Sun Devils team logo decals on both sides. The striking shape of the future. NCAA Arizona State Sun Devils Authentic Revolution Speed helmet size is 13.5'(L) x 9.75'(W) x 10.25'(H). NCAA Arizona State Sun Devils Full Size Helmet.