How to find the right size of strap for your smartwatch Print this page in 100% scale. Do not adjust size of the paper in print setting. You can verify the right size by putting your credit card to the frame below. If the card fits into the frame, size is right and you can cut out the measuring strap. Put the wider end of strap to the place on your 3 wrist where you usually wear the watch. % Than wrap the rest of the strap around your wrist. Tighten the strap around your wrist.
