I have bought this exact helmet twice. It fits my 9-year-old kid, but would likely fit at least an age span of 8-12 year old, easily. My kid rides bikes, but especially trick riding scooter. He does jumps, tail whip transfers, etc, and has had some wipeouts in the process of learning and practicing. This helmet has saved his head a few times. The first one took a decent hit, and saved his head from the pavement. He was fine, but the helmet needed replacing, and I immediately ordered the exact same one. It kept his head safe, so I'm sticking with this one.