Compare two watches on your wrist

Same fit heuristic as the checker, drawn to scale. Last updated: 29 September 2026.

Pick two watches from the catalog, enter a wrist circumference, and read both overhang scores side by side. The drawing uses one scale: usable span, case diameter, and the lug-to-lug length the checker actually scores. A missing lug-to-lug stays Incomplete and the lug bar is left off. Soft SGD bands stay labels, never quotes.

How to read the drawing

1. The rectangle is the usable flat span of the wrist, not the circumference. At 165 mm that span is about 48.3 mm.
2. The circle is published case diameter, on the same millimetre scale.
3. The lug bar is the length the score uses: published tip-to-tip, or the catalog effective span when the integrated box is on and tip-to-tip is unpublished (PRX-class). Turn the integrated box off when both watches publish lug-to-lug and you only want tip-to-tip.
4. Past the rectangle means the scored length is wider than the span. The pill still applies the thickness bump, which a top view cannot show.

Worked pair at the default 165 mm: Black Bay 54 (Ø37, third-party lug-to-lug ~46 mm, 11.2 mm thick) and Black Bay 58 (Ø39, press-kit lug-to-lug 47.8 mm, 11.7 mm thick) both land in Moderate. Explorer 36 at third-party 43.25 mm on the same wrist lands in Low. Datejust 36 has diameter only on our pages, so that column stays Incomplete. Confirm third-party numbers on the wrist; the BB54 vs BB58 guide has the sourcing notes.

Score a one-off spec that is not in the catalog on the fit checker. Filter the whole list on the watch index. Measure first with the sizing guide or the paper tape.