Carolina Panthers Riddell Speed Mini Football Helmet. The ultimate NFL mini football helmet collectible, perfect NFL Riddell Speed Mini Football Helmets for autographs and collectors. Riddell Speed Mini Football Helmet with great graphics. Official NFL Carolina Panthers Riddell Speed Mini Football Helmet with official NFL team decal, ABS plastic shell with S2BD-SW-SP facemask, realistic interior foam padding and vinyl-leather chin strap. This is an affordable NFL football helmet for the true fan. Size: 1/2 scale versions of NFL football helmets. Size: 6"(L), 4½"(W), 5"(H) - (NOT FOR WEARING)