Estimate whether you have a small, medium, or large body frame using your height-to-wrist ratio.
Body frame size is a rough classification of your skeletal build — small, medium, or large — based on the ratio between your height and wrist circumference. It's often used alongside BMI and ideal weight charts, since a larger frame naturally carries more healthy weight than a smaller one.
Frame Ratio = Height ÷ Wrist Circumference (same units). A ratio above 10.4 generally indicates a small frame, 9.6–10.4 a medium frame, and below 9.6 a large frame.
A person who is 170 cm tall with a 16 cm wrist has a ratio of 10.6 (170 ÷ 16), which is classified as a small frame.
This is a simplified estimate — actual frame size also depends on gender and elbow breadth. Use it as a general guide, not a medical measurement.
It's commonly estimated from wrist circumference relative to height, categorizing people as small, medium, or large frame.
Ideal weight ranges are sometimes adjusted for frame size, since a larger-framed person can healthily carry more bone and muscle mass at the same height.
No — it's a rough classification method, useful as a general reference rather than a clinical diagnostic tool.