How do I measure lug width?

Lug width is the distance between the two lugs at the point where the spring bar sits. Remove the existing strap and measure with a digital caliper or a ruler in millimeters. Standard sizes are 18, 19, 20, 21, 22, and 24mm. The number is always in millimeters and is always an even number on most straps (though some vintage watches use odd sizes like 19 or 21mm).

Can I put a 20mm strap on a 22mm watch?

Not securely. A strap that is too narrow will leave gaps at the lugs and shift from side to side. You can use strap adapters or lug adapters to bridge the gap, but they add thickness and can look untidy. Always order straps in the exact lug width — or within 1mm for snug press-fit tolerance.

What lug width does a Rolex Submariner use?

Modern 41mm Rolex Submariner models (ref 126610 and newer) use 21mm lug width, which is less common in aftermarket strap options. Older 40mm Submariners (ref 116610, 16610) use 20mm. Always check the specific reference before ordering — Rolex lug widths are not always standard even within the same model line.

← Guides

Lug Width Finder

Last updated: April 2026 · 3 min read

Search by brand and model to find the lug width you need before ordering a new strap. Covers current Rolex, Omega, Tudor, Seiko, and popular microbrand references.

Tool

Model Lookup

Search model name or reference

Width given in millimeters. When buying straps, match exactly or within 1mm. Bracelet end-link references may differ from strap lug widths.

Measuring lug width if your model isn't listed

Lug width is the distance between the inside faces of the two lugs where the spring bar passes through. Use a digital caliper for best results. If you only have a ruler, remove the strap first so you can measure cleanly between the lug walls.

Common sizes: 18mm (smaller vintage dress), 20mm (most sport/everyday), 22mm (larger divers and tool watches), 24mm+ (oversized pilots and Panerai).

Lug Width Finder

Model Lookup

Measuring lug width if your model isn't listed

Related guides