Wristzilla Fit Lab™
Find Your Perfect Strap Fit
Big wrists deserve better than guesswork. Calibrate your screen with a quarter, measure with a strip of paper, and find the straps built to fit you.
No camera. No upload. No measuring tape required.
Private by design. ScreenFit™ doesn't use your camera or upload an image. No wrist or payment-card photo is required — calibration and measurement happen in your browser.
Prefer a Measuring Tape?
- 1. Wrap a flexible tape around your wrist where you normally wear your watch.
- 2.Keep it snug, but don't pull it tight.
- 3. Note the circumference in inches or millimeters.
- 4. Choose a strap whose maximum wrist rating is at least 0.25 in larger than your wrist.
Wrist Size Is Not Lug Width
Wrist size determines strap length. Lug width determines whether the strap fits between your watch lugs. You need both right.
Common Lug Widths
Find your lug width on an existing strap's underside, in your watch specifications, or by measuring the distance between the inside edges of the lugs.
Fit Lab FAQ
Why do I need a quarter?
A quarter has a known diameter of 24.26 mm, allowing the ruler to be scaled to your physical screen.
Why can’t the website use my screen resolution?
Resolution tells us how many pixels the screen has, not how large those pixels are physically. Two screens can have the same resolution and completely different physical sizes.
Will you photograph my quarter?
No. The quarter is placed over the screen for visual calibration. ScreenFit does not require camera access, and nothing is uploaded.
Can I put my wrist directly against the screen?
No. That measures wrist width rather than the full distance around your wrist. Use a strip of paper to measure circumference.
What if I already know my wrist size?
Use the Enter My Size option and go directly to your fit result.
How much extra strap length do I need?
Choose a strap rated for at least 0.25 inches more than your wrist measurement. Some thicker straps may benefit from additional room.
What is lug width?
Lug width is the distance between the watch lugs. It determines the strap width, not the strap length.
Does ScreenFit work on phones?
Yes, but the ruler may be shown in physically accurate sliding sections because the full length cannot fit on a phone screen at once.