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The hourglass body shape characterised by hip and bust measurements nearly equal in size, with a narrower waist measurement.

This makes the body appear like an hourglass shape.

Medical studies have shown that a curvy waist-to-hip ratio of 0.7 or lower is associated with higher fertility and lower rates of chronic disease. Studies have also shown that men prefer a ratio of 0.7 or lower when looking for a mate.