Unverified85% confidenceDecision RuleTime unknown
护具尺码优先按肘围/膝围周长选而非年龄，学步期宝宝腿型偏细，同年龄段周长差异可达4cm，尺码偏大会滑脱失去防护意义
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85%
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Long-term
Relevance
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Unverified护具尺寸按肢体围度选而非年龄：护膝看大腿/小腿围，护肘看上臂围，围度差1cm就应换码，年龄标注仅作参考因儿童体型差异大88% similarUnverified护具尺寸按周长选而非年龄：护膝护肘的松紧带内径需比孩子肢体周长小1-2cm才能防滑脱，头盔头围要精确测量额头上方最宽处，误差超过2cm会导致移位失去保护87% similarUnverified标注适用3-12岁，但不同孩子体型差异大，买前务必量好孩子膝盖、手肘周长对照尺码表选择，偏大会滑动失去防护作用84% similarUnverified带扶手训练圈的扶手间距和高度直接影响舒适度，扶手过宽小月龄孩子够不到失去支撑意义，选购时留意标注适用月龄区间（多数为12-36个月）84% similarUnverified尺码选择看膝围而非年龄：护膝口松紧带拉伸后应能容纳一指，量取膝盖中心周长后对照品牌尺码表，同龄儿童腿围差异可达4-6cm84% similar
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