If you’re measuring for a heart rate monitor, take the measurement about 1⁄2–3⁄4 in (1. 3–1. 9 cm) up from your wrist bone so you can get the most accurate heart rate readings. [2] X Research source
Be careful not to move your pinky or else you’ll have an inaccurate measurement.
If you’re measuring your wrist width for an open loop bracelet, then lay the string on top of your wrist so the end starts on the knobby bone on one side of your wrist and extends to the other. If you’re measuring for a closed loop bangle, start the string on top of your knuckles and wrap it around your hand so it goes over the base of your thumb. You can also use a flexible measuring tape to find your wrist size if you have one.
If you’re using a flexible measuring tape, look what number lines up with the 0 end. If you’re measuring wrist width, mark the string where it touches the knobby bone on the inside of your arm.
You can also use a tape measure if you don’t have a ruler.
For example, if your wrist circumference was 5 1⁄2 inches (14 cm), then the final measurement will be 6 inches (15 cm). Don’t add anything to your measurement if you’re measuring for a heart rate monitor since it needs to be snug on your skin to get an accurate reading.
Don’t add any additional length to your measurement. You can also use a flexible tape measure if you have one. Look where the tape overlaps the 0 mark at the end to record your measurement.
Make sure you’re standing on a hard floor rather than carpet since it could affect your height measurement.
For example, if you’re a woman between 62–65 inches (160–170 cm) tall, you have a small frame if your wrist is smaller than 6 inches (15 cm), a medium frame if it’s between 6–6 1⁄4 inches (15–16 cm), and a large frame if it’s larger than 6 1⁄4 inches (16 cm). You can find a body frame size chart here: https://medlineplus. gov/ency/imagepages/17182. htm. Talk to your primary care provider about what your frame size means for your ideal weight or body mass index.
