Body Size Calculator - Metric (Kilos)
Calculate if your body frame is small, medium, or large. Ideal body weight calculators and BMI calculators often use weight ranges based on body frame size, so knowing your body frame size helps determine the weight that's right for you.
Measuring your wrist circumference: You can use a tape measure. Or, if you don't have one around, use a piece of string, or even a strip of paper, and then use a ruler to measure that.