Bell Infant Sprout Bike Helmet (Love Bugs/Pink) Size : 47-52cm Keep little ones' heads protected while they're riding in child carriers, bike trailers, or starting to learn on their own bikes True Fit feature offers simple, custom sizing every time; seven top vents keep kids' heads cool High-impact reflectors improve visibility Pinchguard buckle prevents painful "chin-pinch" Grow With Me padding lets you size up your purchase, and let your little one's head grow into it over time