How to measure wrist circumference girth.
Wrist circumference is the smallest girth on the upper extremity and is unique because it reflects skeletal frame size — bone structure rather than muscle mass. It's the reference point for the McCallum ideal-proportions formula and is also used in frame-size classification.
Convert Wrist measurement
Typical range: 16–19 cm for adult men, 14–17 cm for adult women
How to measure
Hold your arm out with the hand relaxed and palm facing up. Wrap a flexible tape around the wrist at the narrowest point, just distal to (below) the wrist joint and proximal to (above) the wrist bone — typically where you'd wear a watch. The tape should sit flat and snug without compressing. Measure the non-dominant arm for the standard reference reading.
Tips for accuracy
- Measure at the narrowest point, just below the wrist joint
- Use the non-dominant wrist for frame-size classification
- Don't pull tight — the tape should be flat against the skin, not compressing
- Wrist girth is stable over time; once measured, you rarely need to remeasure
What it's used for
Frame size classification (small/medium/large), McCallum ideal proportions baseline (chest = 6.5 × wrist), bracelet sizing