Big Ten Conference Riddell NCAA Replica Mini Helmet. Helmet Features The Legends stripe with Iowa, Michigan, Michigan State, Minnesota, Nebraska and Northwestern. Helmet Features The Leaders stripe with Wisconsin, Purdue, Penn State, Ohio State, Indiana and Illinois. The greatest miniature sports collectible ever invented! Approximately 1/2 scale versions of collegiate helmets. ABS plastic shells with plastic facemask and authentic-looking team decals. This helmet has become a staple in the collectible market for several good reasons. It's affordable, doesn't take up too much room, and showcases an autograph like nothing else! Once you start your collection you'll be hooked!