Notre Dame Shamrock NCAA Mini Football Helmet The ultimate NCAA college mini football helmet collectible, perfect NCAA college mini football helmets for autographs and collectors. Mini football helmet with great graphics. Official NCAA mini football helmet with official NCAA team decals. ABS plastic mini football helmet shells with plastic facemask. Realistic interior foam padding, vinyl-leather chin strap. This is an affordable NCAA football helmet for the true fan. Size: 1/2 scale versions of NCAA football helmets. Size: 6" (L), 4 1/2" (W), 5" (H) - (NOT FOR WEARING).