Back Support Size ChartClose
To determine Air Belt, ATA and Back Coach size, use waist measurement. For Lumbosacral & Elliptic Air, use hip measurement. Add 2" if worn over clothing.
 
SizeAir BeltDual AdvantageATA & Back CoachLumbosacral & Elliptic
Small24"–28", 61-71 cm28" – 32", 71-81 cm24"-32", 61-81 cm24" – 28", 61-71 cm
Medium29"–35", 74-89 cm33" – 36", 84-91 cm32"-37", 81-940 cm29"-35", 74-89 cm
Large36"-41", 91 -104 cm37"-42", 94-107 cm36"-42", 91-107 cm36"-41", 91-104 cm
X-Large42"-50", 107-127 cm43"- 48", 109-122 cm41"-48", 104-122 cm42"-46", 107-117 cm
XX-Large51"-56", 130-142 cm49"-54", 124-137 cm46"-52", 117-132 cm47"-52", 119-132 cm
XXX-Large57"-62", 145-157 cm55"-60", 140-152 cm53"-58", 135-147 cm53"-58", 135-147 cm
Air Plus fits combined sizes Small/Medium and Large/X-Large.

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