Answer (1 of 8): Measure your hips at the widest point, (not at the waist or hip bones, but right around the butt and upper thighs). Use this number (I am a 40.5”) and use a size chart from any website that sell panties (HerRoom, Macys, Soma) and it will give you a size in US units (I am size 7
Underwear Size Chart – WAMA Underwear
How to know what size of women's underwear will fit me without trying them on - Quora
Underwear Size Chart
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Underwear Size Chart
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