Nutcase’s Baby Nutty Helmet features a no pinch, no tears Fidlock magnetic buckle® and an easy-on fit system that grows with your toddler. The ergo-design promotes optimal bike seat posture and front, top and back venting is designed to keep little heads cool. Other features include an Expanded Polystyrene (EPS) protective foam and a lightweight in-mold shell for growing bobble heads. Baby Nutty comes in one size, XX-Small, for head sizes 18?’ – 19?’ (47cm – 50cm). If Baby Nutty is too small for your child, please consider Nutcase’s Little Nutty helmets. Engineered, tested, and CPSC certified for 1 year and older.