Bell Recon X-Games Multi-Sport Matte Black Helmet - 5+ (20" - 21 1/4" / 51 - 54 cm) Bell Recon X-Games Multi-Sport Helmet - 5+ Color: Matte Black 20" - 21 1/4" / 51 - 54 cm 12 Vents Keep You Cool Side Squeeze Buckle, Adjusts In A Snap