GROTTICO is a registered brand, which we devote to develop sport protective equipment. Our goal is to provide safety, happiness, and comfort for you or your kids during outdoor activities. GROTTICO SKATEBOARD / BIKE / SCOOTER HELMET is with the super cool MATTE finish and SUPPER quality. Pass US standards safety testing - ASTM F1492 & CPSC. REINFORCED ABS SHELL & SHOCK-ABSORBING EPS. 4 colors BLUE / BLACK / PINK / PURPLE helmet, 2 size S / M choose for toddler / kids / youth. Designed according to children's head shape. Size Chart Please measure the circumference above eyebrows with a tape measure or string to get the head size and make the right purchase. S: 20-21.7inch / 51-55cm(about 3-5 years old) M: 22-22.8inch / 56-58cm(about 6-14 years old) Package Includes: 1 x GROTTICO Helmet 2 x Inner Lining Set 1 x Package Bag 1 x User Manual Come on! Take action! You will get it soon! GROTTICO TEAM will always with you. Don't hesitate to contact us with any question.