Body Frame Size Calculator
Determine whether you have a small, medium or large body frame using height and wrist circumference.
What is Body Frame Size?
Body frame size is a useful adjustment when interpreting ideal weight charts. People with a large frame naturally carry more bone and connective tissue and may sit at the upper end of healthy weight ranges without excess fat. Wrist circumference is preferred over elbow because the wrist contains relatively little soft tissue and reflects skeletal size.
How is it calculated?
Frame size = height (cm) ÷ wrist circumference (cm). For men: >10.4 small, 9.6–10.4 medium, <9.6 large. For women: >11.0 small, 10.1–11.0 medium, <10.1 large.
Frequently Asked Questions
- Where do I measure wrist?
- Just distal to the styloid process (just above the wrist crease) on your dominant arm.
- Does frame size change with age?
- Bone changes are minimal in adults until later life when frame slightly contracts.
- Why does frame size matter?
- It refines ideal-weight estimates and helps interpret BMI in very lean or muscular people.