Waist–hip ratio is the ratio of the circumference of the waist to that of the hips. It measures the proportion by which fat is distributed around the torso. Waist–hip ratios of 0.7 for women and 0.9 for men have been shown to correlate strongly with general health and fertility. This shape is compared to the hourglass shape of women.Female Body Characteristics Related to Bra Fit - Page 20, 2007
