NFL Riddell Speed AMP Mini Football Helmet. Our new, distinctively fresh, yet familiar alternate helmet collection adds a colorful twist to your favorite NFL team helmet. AMP Alternates utilize different color schemes for the shells and facemasks with a unique take on the current team logos. Official NFL mini football helmet with official NFL team decals, ABS plastic mini football helmet shells with plastic facemask, realistic interior foam padding and vinyl-leather chin strap. The Riddell Speed AMP Mini Football Helmet is a must-have addition to any collection! Size: 1/2 scale versions of NFL football helmets. Size: 6"(L), 4 ½"(W), 5"(H) - (NOT FOR WEARING).