Colorado Buffaloes Alternate Matte White Revolution SPEED Mini Helmet. The ultimate NCAA Pac-12 Conference mini speed helmet collectible, perfect for autographs and collectors. This is an affordable NCAA football helmet for the true fan. Official NCAA Mini Speed Football Helmet is made with official Colorado Buffaloes Rebels NCAA team decals. Each Colorado Buffaloes Mini Speed Football Helmet is made with great graphics, ABS plastic Mini Helmet shells with plastic helmet face guard, realistic interior foam padding and vinyl-leather chin strap. Size: 1/2 scale versions of NCAA football helmets.Size: 6"(L), 4½"(W), 5"(H) - (NOT FOR WEARING).