Body Frame Size Calculator
Find out whether you have a small, medium or large frame from your height and wrist circumference. Example: a man 70 in tall with a 6.5 in wrist has a ratio of 10.77, a small frame.
Show steps
How to use the Body Frame Size Calculator
- Enter the values in the fields.
- Press Calculate to see the result with the steps shown.
Formula and method
r = height / wrist circumference. Men: small r > 10.4, medium 9.6 to 10.4, large r < 9.6. Women: small r > 11.0, medium 10.1 to 11.0, large r < 10.1.
Frame size cutoffs
| Frame | Men (r) | Women (r) |
|---|---|---|
| Small | Above 10.4 | Above 11.0 |
| Medium | 9.6 to 10.4 | 10.1 to 11.0 |
| Large | Below 9.6 | Below 10.1 |
Wrist size guide for women 5 ft 5 in (65 in)
| Wrist (in) | Frame |
|---|---|
| Under 5.9 | Small |
| 5.9 to 6.4 | Medium |
| Above 6.4 | Large |
How to measure
Wrap a tape measure just past the wrist bone, snug but not tight, on the hand you do not write with is also fine if you are consistent.
Using frame size
Some ideal-weight charts give a range by frame: take 10% off for a small frame and add 10% for a large frame. This calculator gives estimates for education and planning, not medical advice. Check with your doctor before major changes to diet, exercise or medicines, especially if you have a medical condition.
Frequently asked questions
How do I find my frame size?
Divide height by wrist circumference.
What are the frame sizes?
Small, medium and large.
Does frame size change ideal weight?
Slightly, in older charts.
Can bone structure change?
No, only fat and muscle do.
Is this medical?
No.
What is a ratio for medium frame?
9.6 to 10.4 for men.
Sources
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