What do your body proportions actually reveal?

At the narrowest part of your torso, usually just above the navel and below the ribcage. Stand relaxed, breathe out, and lay the tape against the skin without pulling it tight, because a tape drawn snug shaves the waist figure down and pushes your ratio in a flattering direction. Take it on bare skin or over one thin layer of clothing, and avoid measuring straight after a large meal or when your abdomen is distended.

No. The WHO thresholds of 0.90 for men and 0.85 for women describe where cardiovascular risk rises across a whole population, which is a different claim from anything about one person. Blood pressure, cholesterol, smoking status, family history and overall fitness all sit alongside the ratio in a real risk assessment. Sitting inside the normal band buys you no protection on its own, and sitting slightly outside it is not a diagnosis.

No, at least not in any form that survives checking. Markowsky (1992) went through the standard examples one by one and found the golden ratio claims resting on measurements picked after the fact, or on arithmetic errors that happen to land near 1.618. Attractiveness studies do show higher shoulder-to-waist ratios rating better in some populations, which supports a broad direction and says nothing about one exact value. Your ratio here is reported against the population distribution.

Singh (1993) put it at about 0.70, from studies where men rated line drawings of female figures, so a waist roughly 70% of the hip circumference. That was Western industrialised taste in the early 1990s and it has not travelled well; cross-cultural studies have found preferences running from 0.60 in some South Asian samples to 0.90 in some sub-Saharan African ones. Hold it next to the weighted NHANES 2017 to 2018 figure of about 0.90 for the average US woman and the supposed ideal sits below almost every woman the survey measured. The WHO threshold of 0.85 for women is a separate matter again, a clinical risk marker rather than a preference. Singh D. Journal of Personality and Social Psychology. 1993;65(2):293-307.

Across the widest point of the shoulders, arms hanging loose, ideally with someone else holding the tape. Doing it alone almost always understates the figure, because reaching round pulls the shoulders forward and narrows the very thing you are trying to record. A straight width measured across the back is easier to repeat than a circumference taken over the top. Whichever method you pick, use the same one every time, since the ratio only tells you anything when compared with itself or with the population.

It stands in for central adiposity, the fat packed around the organs, which tracks cardiovascular risk more closely than either total body fat or BMI. A 2008 WHO expert consultation set the markers at 0.90 for men and 0.85 for women, above which population studies show much higher rates of cardiovascular disease and type 2 diabetes, along with raised all-cause mortality. Visceral fat is metabolically active and feeds insulin resistance and inflammation in a way that subcutaneous fat on the hips and thighs does not. None of that makes the ratio a diagnosis, and medical risk assessment reads it alongside blood pressure, fasting glucose and lipid panels. WHO. Waist Circumference and Waist-Hip Ratio: Report of a WHO Expert Consultation. 2008.

About 0.90 for women and 0.97 for men, on weighted CDC NHANES exam data for 2017 to 2018, which puts the average American man well past the WHO risk line of 0.90 and the average woman past hers at 0.85. Waists have grown faster than hips over recent decades, so the whole distribution has drifted upward, and it is right-skewed, with more people well above the middle than well below it. Age does much of that work, since waist circumference outpaces hip circumference from middle age onward. Average body proportion ratios alongside the other US physical measurements are collected on the body statistics page. CDC/NCHS. NHANES Anthropometric Reference Data for Children and Adults. United States.

Yes, upward, and the reasons are mostly hormonal. In women the fall in oestrogen through perimenopause and menopause moves fat storage off the hips and thighs and onto the abdomen, which lifts the ratio whether or not the scales move. Lower testosterone does something similar to men as they age. A ratio that read as ordinary in early adulthood can therefore cross into clinically elevated territory decades later at the same body weight, which is why some clinical guidelines use age-specific thresholds. Population comparisons here are age-adjusted where the NHANES reference data allows it. WHO. Waist Circumference and Waist-Hip Ratio. 2008.

They answer different questions. BMI is weight against height and cannot tell muscle from fat, or fat on the abdomen from fat on the hips and thighs, while the waist-to-hip ratio ignores how much there is and reports only where it sits. Czernichow and colleagues pooled 82,864 participants from nine British cohort studies in Obesity Reviews and found the waist-to-hip ratio and waist size, but not BMI, tied to cardiovascular death once other factors were allowed for, though none of the three was clearly better at picking out who would die. A heavily muscled athlete can post a high BMI with a healthy ratio, and the reverse turns up just as often. Read the two together. Czernichow S et al. Obesity Reviews. 2011;12(9):680-687.

No, and the sampling explains why. Most of the early waist-to-hip and shoulder-to-waist work ran on Western, educated, industrialised, rich and democratic participants, the group psychologists label WEIRD, which is a thin slice of humanity to generalise from. Replications elsewhere have come back mixed, with preferred ratios shifting according to local diet, body weight and what the surrounding population happens to look like. So this page hands you the distribution and leaves the judgement to you.