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选头围而非年龄：48-52cm适合约1-3岁，50-54cm适合3-7岁，52-56cm适合5-12岁，购买前需用软尺测量眉毛上方1指处的最大周长

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儿童头盔category

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Unverified拍长分多种规格（约53-63cm），选购时应根据孩子身高而非年龄选拍长：100cm以下身高选最短款，120cm以上可选接近成人短拍的长度82% similar Unverified选头盔以头围为准而非年龄：用软尺测量眉毛上方约2cm处头围最大值，一般48-52cm适合3-5岁、52-56cm适合6-10岁，预留1-2cm可调节余量即可，切勿买大'留着长个'82% similar

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