🎁 Size Options: Available in 3 sizes for the BURSUN skateboard helmet - Small (48-54cm / 18.9‘’-21.3‘’) for kids (5-9 years), Medium (54-57cm / 21.3‘’-22.4‘’) for youth (9-16 years), and Large (57-61cm / 22.4‘’-24‘’) for adults (16+ years). We recommend measuring the circumference of your head before purchase. Use a soft tape measure to wrap around the widest part of your head to select the appropriate size. 🎁【Safety Design】: This helmet features a high-strength ABS shell and padding, providing robust head protection during skateboarding/biking activities. The interior is equipped with durable EPS foam, effectively mitigating impact forces during collisions and ensuring head safety. 🎁【Comfortable Fit Design】: Ergonomically designed, this skateboard helmet fits the shape of your head with excellent comfort and stability. Adjustable buckles and inner pads are designed to give you unparalleled comfort during skateboarding/biking. 🎁【Safe and Reliable】Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older (Extended Head Coverage）,this skateboard helmet can provide professional protection . 🎁Multipurpose: This helmet is not only suitable for skateboarding, but also for cycling, scootering, rollerblading, inline skating, rollerblading and other outdoor activities.