Mini Blank Speed Football Helmet With NO Chin Strap. ABS plastic Mini Speed Football Helmet shells. Realistic interior foam padding. Take this blank mini helmet shell and make your own custom helmet! Facemask is NOT included. We have facemasks and blank helmets available in several different colors. Both the blank shell and facemask are made by Riddell. Size: 1/2 scale versions of football helmets. Size: 6"(L), 4½"(W), 5"(H) - (NOT FOR WEARING).