18 mm straps: the lug width for Omega, Longines, IWC and others

You own an Omega, a Longines, or perhaps a Nomos with 18 mm lugs on your wrist. Before choosing your next strap, look at the lugs: their width determines how the leather bends, how it sits under the case, how long the fold lasts before it cracks. Eighteen millimeters is a precise measurement—not close, not 'roughly'. We have 4243 models in our archive that carry it, from Omega to Breguet.

SIZE 18MM · ALLIGATOR

Why 18 mm is not a measurement like any other

Eighteen millimeters is a transitional width. It sits below 20 mm, which accounts for 38.8% of all watches in our archive—the most common by far—and above 16 mm, which holds at 7.4%. On an 18 mm lug, the strap works closer to the center of the case: the curve between lug and wrist is tighter, and the leather must follow it without creating visible creases in the first millimeters next to the buckle.

Alligator, with its regular pattern of scales, follows this curve better than stiffer leathers: it bends where needed without crinkling elsewhere, and with wear the crease sets at one precise point, it does not shift. On thinner movements—certain Nomos Glashütte, some vintage Longines—the 18 mm lug leaves the strap almost flush with the case; on bulkier chronographs like certain Breitling models, the same width creates an intentional contrast between wide lug and narrower strap.

Among the brands we reference—Omega, Breitling, Longines, IWC, Nomos Glashütte, Vacheron Constantin, Glashütte Original, Breguet—the width remains 18 mm, but the lug shape changes: straight, curved, faceted. The strap must adapt to that shape before it adapts to the wrist.

Cinturini Alligatore 18mm

Available leathers

Choose the leather

Alligator

Compatibility

Compatible watches

Omega Constellation 123.55.27.60.55.013 (aka: 12355276055013) 18mm
Omega 123.55.27.60.55.013 (aka: 12355276055013)
Omega Constellation 123.25.27.20.55.003 (aka: 12325272055003) 18mm
Omega 123.25.27.20.55.003 (aka: 12325272055003)
Breitling Galactic W7433012.BE08.214X 18mm
Breitling W7433012.BE08.214X
Breitling Galactic A7433053.A780.215X 18mm
Breitling A7433053.A780.215X
Longines La Grande Classique L4.705.4.58.6 (aka: L47054586) 18mm
Longines L4.705.4.58.6 (aka: L47054586)
IWC Portofino IW3592-02 (aka: IW359202) 18mm
IWC IW3592-02 (aka: IW359202)
IWC Portofino IW3731-06 (aka: IW373106) 18mm
IWC IW3731-06 (aka: IW373106)
Longines La Grande Classique L4.741.0.12.6 (aka: L47410126) 18mm
Longines L4.741.0.12.6 (aka: L47410126)
Nomos Glashütte Tangente 501 18mm
Nomos Glashütte 501
Nomos Glashütte Tangente 116 18mm
Nomos Glashütte 116
Breitling Colt A74389111A1X1 (aka: A7438911/A771/216X/A16BA.1) 18mm
Breitling A74389111A1X1 (aka: A7438911/A771/216X/A16BA.1)
Breitling Colt A7438911/A771/216X/A16BA.1 18mm
Breitling A7438911/A771/216X/A16BA.1
Longines Presence L4.821.4.75.6 (aka: L48214756) 18mm
Longines L4.821.4.75.6 (aka: L48214756)
Longines Presence L4.720.4.72.2 (aka: L47204722) 18mm
Longines L4.720.4.72.2 (aka: L47204722)
Breguet Classique 5177BA/15/9V6 18mm
Breguet 5177BA/15/9V6
Breguet Classique 9087BR/29/964 18mm
Breguet 9087BR/29/964
Vacheron Constantin Métiers d’Art 17621/000G-9478 18mm
Vacheron Constantin 17621/000G-9478
Vacheron Constantin Métiers d’Art 86073/000R-B153 18mm
Vacheron Constantin 86073/000R-B153
Glashütte Original Lady Serenade 1-39-22-20-22-34 18mm
Glashütte Original 1-39-22-20-22-34
Glashütte Original Lady Serenade 1-39-22-12-02-04 18mm
Glashütte Original 1-39-22-12-02-04
Omega Speedmaster (Non-Moonwatch) 324.55.38.50.60.001 (aka: 32455385060001) 18mm
Omega 324.55.38.50.60.001 (aka: 32455385060001)
Omega Speedmaster (Non-Moonwatch) 3813.30.11 18mm
Omega 3813.30.11
Vacheron Constantin Traditionnelle 83570/000R-9915 18mm
Vacheron Constantin 83570/000R-9915
Vacheron Constantin Traditionnelle 86060/000R-9965 /00 18mm
Vacheron Constantin 86060/000R-9965 /00
IWC Ingenieur IW3807-03 (aka: IW380703) 18mm
IWC IW3807-03 (aka: IW380703)
IWC Ingenieur IW3505-01 (aka: IW350501) 18mm
IWC IW3505-01 (aka: IW350501)
Oris Aquis 733 7652 4994 18mm
Oris 733 7652 4994
Oris Aquis 01 733 7731 4995 18mm
Oris 01 733 7731 4995
Nomos Glashütte Tetra 414 18mm
Nomos Glashütte 414
Nomos Glashütte Tetra 453 18mm
Nomos Glashütte 453
Piaget Altiplano G0A31114 18mm
Piaget G0A31114
Piaget Altiplano G0A40112 18mm
Piaget G0A40112
Omega De Ville 413.25.27.60.58.001 (aka: 41325276058001) 18mm
Omega 413.25.27.60.58.001 (aka: 41325276058001)
Omega De Ville 424.13.27.60.55.001 (aka: 42413276055001) 18mm
Omega 424.13.27.60.55.001 (aka: 42413276055001)
Hamilton Jazzmaster H32305195 18mm
Hamilton H32305195
Hamilton Jazzmaster H32215140 18mm
Hamilton H32215140
Audemars Piguet Jules Audemars 15140OR.ZZ.A088CR.03 18mm
Audemars Piguet 15140OR.ZZ.A088CR.03
Audemars Piguet Jules Audemars 15056BC.OO.A001CR.02 18mm
Audemars Piguet 15056BC.OO.A001CR.02
Nomos Glashütte Club 742 18mm
Nomos Glashütte 742
Nomos Glashütte Club 708.S2 18mm
Nomos Glashütte 708.S2

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Frequently asked questions

Which watch brands fit an 18mm lug width?

Omega, Breitling, Longines, IWC, Nomos Glashütte, Vacheron Constantin, Glashütte Original and Breguet are among the brands that often use this lug width. In our watch archive, almost all models from these brands have an 18mm lug width. For your specific model, it's still worth checking, as sizes can vary even within the same brand.

How can I find out if my watch has an 18mm lug width?

The safest way is to look up your model in Milano Straps' watch archive, also via the "Find your watch's size" box featured on every product page. Alternatively, send a photo of your watch to the atelier on WhatsApp using the "Verify on WhatsApp" button, or photograph it on app.milanostraps.it, which recognises the size. Only as a last resort, measure the distance between the two lugs with a ruler or callipers: never a ruler alone.

Where can I find 18 mm alligator straps?

On this page you will find ready-made 18 mm alligator straps, nine pieces in the catalogue. They can be chosen and taken home directly online, with no need for an appointment. Each piece has its price shown on its page, along with details on the leather and stitching.

How many alligator strap models are there in this 18 mm collection?

In this collection you will find nine alligator straps, all worked with vegetable tanning and saddle stitching. These are ready-made pieces, which can be browsed and chosen directly from the page. The 18 mm size offered here covers almost all models from brands such as Omega, Longines and IWC.

Can I order an 18 mm strap made to measure?

Made to measure is not offered by Milano Straps but by Casati Milano, made only by appointment in the atelier at Via XX Settembre 15 in Milan. Milano Straps instead offers ready-made straps, already in the catalogue, with verified lug width and price shown online. For made to measure, you can visit casatimilano.com.

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