Wrist Circumference Frame Size Calculator
Body Frame Size
Determine your frame size from wrist circumference and height
cm
cm
Wrist-Based Muscular Potential
Estimate maximum muscular measurements based on wrist size (Casey Butt method)
cm
cm
cm
Formula
Male: Small <6.5in, Medium 6.5-7.5in, Large >7.5in wrist | Female varies by height
Frequently Asked Questions
How does wrist size determine frame size?
Wrist circumference is used because it has minimal fat and muscle. It reflects bone structure (frame size) accurately. Men: <6.5in small, 6.5-7.5in medium, >7.5in large. Women vary by height.
Why does frame size matter?
Frame size affects ideal weight ranges. A large-framed person may be healthy at a weight that would be overweight for a small-framed person. It also correlates with natural muscular potential.
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