Body Frame Size Calculator
Find your body frame size from height and wrist circumference
Frequently Asked Questions
Divide your height by your wrist circumference (both in the same unit). The resulting ratio is compared against sex-specific cutoffs to classify your frame as small, medium, or large.
Frame size reflects bone structure, not fat or muscle. Older height-weight tables adjusted healthy weight ranges by frame size, since a larger-framed person carries more healthy weight at the same height.
Measure around your wrist at the narrowest point, just below the wrist bone toward your hand, using your dominant hand.
No. Frame size (small/medium/large) is about skeletal size specifically, while body type or somatotype (ectomorph/mesomorph/endomorph) describes overall build including muscle and fat distribution.