Denver Broncos Full Size Authentic NFL Revolution Helmet by Riddell. This full size Denver Broncos 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. NFL Team name on back bumper. The officially licensed Indianapolis Denver Broncos helmet is great for autographs and features Denver Broncos team logo decals on both sides. The striking shape of the future. NFL Denver Broncos Authentic helmet size is 13.5(L) x 9.75(W) x 10.25(H). NFL Denver Broncos Full Size Revolution Helmet.