Unverified78% confidenceDecision RuleTime unknown
头围尺码不能只看年龄段，需实测宝宝头围：多数学步帽调节范围为42-52cm，购买时应确保宝宝当前头围处于可调节区间的中段，留出生长余量
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78%
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Long-term
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Unverified选购前需实测宝宝头围，10-18个月头围多在44-48cm，护头帽应带可调节魔术贴或松紧带，预留2cm生长空间，头围超出档位会压迫或滑脱失去防护作用86% similarUnverified选购时看头围调节范围：0-2岁婴儿头围约42-52cm，耳罩头带可调范围应能覆盖此区间且松开状态仍能贴合，标称'新生儿-3岁'但最小档>46cm的产品对小月龄不适用85% similarUnverified购买前测量宝宝头围，选带魔术贴或松紧可调的尺码，覆盖±3cm调节范围可用更久；宝宝头围6-18月约增长3-4cm84% similarUnverified选购时头围可调范围应覆盖宝宝当前头围±3cm，学步期头围月增长约0.5cm，固定尺寸头盔通常3-4个月就需更换82% similarUnverified帽子过紧（无调节且尺寸偏小）会压迫囟门未完全闭合的婴儿头部，1岁内选购必须确认可调节且松紧接触点避开头顶正中79% similar
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