Michigan Wolverines Authentic Speed Football Helmet. Perfect item for autographs and collectors. This full size Michigan Wolverines 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 Michigan Wolverines helmet is great for autographs and features Michigan Wolverines team logo decals on both sides. The striking shape of the future. NCAA Michigan Wolverines Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H). NCAA Michigan Wolverines Full Size Helmet. HELMETS ARE INTENDED FOR DISPLAY ONLY & NOT FOR WEARING. (NCAA FULL SIZE HELMETS HAVE PLATE OR BAR INSIDE)