Thank you for viewing. This is a Black Diamond helmet. ● Size: S/M (53-59cm) ● Weight: 201g *Measured at home I bought it for its lightness and coolness, but the size didn't fit, so I stopped using it after a few uses and bought a larger size. It had been sitting in a mountain gear box for about 2 years after that. It's still in good condition, so I'm putting it up for sale. Please check the photos for dirt and scratches. The stickers are noticeably peeling off as it was used in the mountains. Please understand that this is a used item. I would appreciate it if you could purchase it. No returns or exchanges, please.