Size: S/M 53-56cm Weight: 350g Used by my daughter when she was in 3rd and 4th grade of elementary school. Used about 3 times over 2 seasons. *Because my child is very slender, I think it can be used from 1st grade for children of standard build. I considered brands like Bolle from France, but the helmets themselves were heavy, and I was worried about the strain on my child's neck, so I searched and searched and bought this helmet. It's incredibly lightweight and has ear pads, goggle retainers, and a size adjustment function, so it's perfect. There are no dents or major scratches or stains, so I think you can use it with confidence.