Unverified82% confidenceDecision RuleTime unknown
座面尺寸应比常用沙发/座椅座面小5-8cm，过大会悬空导致坐姿不稳，过小则起身时垫子边缘顶臀部造成疼痛；标准款座面约40×40cm，适配大多数单人沙发
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Unverified购买前需测量椅面宽度，U型坐垫通常宽度在40-45cm左右，窄椅面或带扶手的办公椅可能放不下或卡不稳82% similarUnverified沙发坐深≥55cm适合躺靠半卧，坐深48-52cm适合正襟端坐；身高<160cm选坐深≤52cm，否则脚够不到地面悬空压腿81% similarUnverified坐垫套内径尺寸应比椅面实测尺寸小1-2cm，套上后靠面料弹性绷紧，过大会滑动移位、过小则套不进；圆凳套优先选带松紧收口设计80% similarUnverified常见餐椅坐垫套内径规格：方椅40×40cm/45×45cm，圆凳直径32-40cm，购买前用软尺测量椅面最宽处而非目测80% similarUnverified坐垫厚度并非越厚越好：厚度＞8cm会显著抬高坐姿导致脚够不到地、大腿受压，办公椅建议3-5cm，需垫高身高的短腿桌椅才选厚款80% similar
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