Unverified90% confidenceDecision RuleTime unknown

头围适配需实测：0-1岁约42-48cm，1-2岁约46-50cm，可调节魔术贴/松紧带比固定尺寸款适用周期长6个月以上，避免买后很快勒头

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Unverified选购前务必量头围：6-12月约44-46cm、1-2岁约46-48cm，头围帽应比实测大1-2cm留出缓冲垫空间，且必须可调节以适应快速长头围86% 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'85% similar Unverified标准魔术头巾展开尺寸约48cm×25cm(周长48cm)适配大多数成人头围；儿童或小头围应选周长≤42cm款，否则戴帽子/头套模式易松脱83% similar

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