Fit checker — wrist, lug-to-lug, thickness
This is the site’s unique calculator — not a reprint of a buying guide. Diameter is incomplete. Enter your wrist, then a watch’s lug-to-lug (and thickness if you have it). We estimate a usable span from circumference and score Low / Moderate / High. Missing L2L stays Incomplete — we do not invent tip-to-tip from Ø. Soft SGD never appears as a quote. Numbers you type stay in this browser; see About & method.
How the score is built
Usable span ≈ (wrist circumference ÷ π) × 0.92 — so ~165 mm (~6.5") maps to a ~48 mm ceiling, matching our lug-to-lug guide. L2L ≤ 90% of span is Low; up to 100% is Moderate; past that is High. Thickness ≥ 13 mm bumps one level (the Speedy-class cuff trap). Third-party L2L is labelled unofficial.
Browse the same rows as a filterable table: watch index. Measure first on the sizing guide.