Learn · Why waist
Why your waist tells the truth
The short answer
Waist size is the simplest signal of the deep belly fat that drives diabetes, heart and kidney disease in South Asians.
1 in 3
adults with diabetes
35.5 in / 90 cm
Waist cut-off: men
31.5 in / 80 cm
Waist cut-off: women
Cut-offs for South Asian adults: International Diabetes Federation (IDF).
How to measure in 4 steps
A tailor's tape and two minutes. No scale, no clinic.
1
Stand relaxed, exhale
2
Find the midpoint
3
Tape flat and snug
4
Read at eye level
Where the cut-offs sit
Each marker sits where healthy ends and "worth a check" begins.
Men
Women
Colour is only a hint. Being above the line means "get checked", not "something is wrong".
Questions people actually ask
For South Asian bodies the healthy line sits at 35.5 inches (90 cm) for men and 31.5 inches (80 cm) for women. Below your line you are in the healthy range. At or above it, a quick check is worth your time.
Tape ready? It takes 60 seconds.
One measurement, a plain-language result, and what to do next. Free, no sign-up.