One of the most common questions we get: will this strap fit my watch? The answer depends on three things — your watch's attachment style, its lug width, and whether it has curved lugs. Work through each section below and you'll have a definitive answer.
1. What Attachment Style Does Your Watch Use?
Regular (Standard Spring Bar): The most widely used type — two flat, parallel lugs with a spring bar running between them. All JackCoHenry ready-to-wear straps are designed for this style.
Curved Lug: Some watches have lugs that angle downward to follow the case shape. A flat strap won't sit flush, so you need a curved-end strap instead. Common examples: F.P. Journe, H. Moser & Cie, Ming. JackCoHenry offers curved straps for these references.
Integrated / Insert Style: Watches like the Audemars Piguet Royal Oak and Cartier Santos use a proprietary insert system — standard aftermarket straps won't work. If you have an original strap with the insert intact and are open to repurposing it, contact us to discuss.
Bracelet (Detachable): If your watch came on a metal bracelet you can remove, check whether the watch head underneath has standard parallel lugs. If it does, any of our ready-to-wear straps will fit once the bracelet is off.
Deployant / Male Connector: Requires a strap with a matching female slot. Available as a custom order — contact us with the exact connector dimensions.
Integrated Sports / Digital: Proprietary band connections found on sports and digital watches are not compatible with aftermarket straps.
2. What Is the Lug Width of Your Watch?
Lug width is the internal gap between your watch's two lugs — the measurement that determines which strap size you need. It's always a whole number in millimeters.
Two ways to find it:
-
Google "[your watch brand and model] lug width" — manufacturer specs or watch databases will have it.
-
Measure it directly with a digital caliper or ruler across the inside of the lugs.
3. Does Your Watch Have Curved Lugs?
Look at your watch from the side. If the lugs angle steeply downward, a straight-end strap will gap at the case and sit uncomfortably. You'll need a curved-end strap instead.
Rolex tip: If you'd rather use a straight strap on a Rolex with sharp lug edges, tape the case where the strap makes contact — it prevents the metal from nicking the leather.
Frequently Asked Questions
Q. Will JackCoHenry straps fit a Rolex Submariner, Datejust, or Explorer?
Yes. Most Rolex references use standard spring bars. The Submariner and Datejust 41mm both use 20mm lug width. Some Rolex models have curved lugs — a curved-end strap gives the cleanest fit on those.
Q. Can I use your straps on an Audemars Piguet Royal Oak or Patek Philippe Nautilus?
These use integrated strap systems with proprietary inserts, which aren't compatible with standard straps. We do not guarantee production of straps for these unless the original strap and insert can be repurposed.
Q. My lug width isn't listed in your ready-to-wear sizes — what do I do?
We can make a strap to your exact specification as a custom order. Get in touch with your watch details.
Q. What if I'm still not sure?
Send us your watch brand, model, reference number, or a photo of the lugs — we'll tell you exactly what fits before you order.
Ready to Order? Read These Next
Once you've confirmed your watch takes a standard spring bar strap and you know your lug width, the next step is getting the size right. JackCoHenry offers S, M, and L strap lengths — or a custom length made to your exact spec.
→ Watch Strap Sizing Guide — measure lug width, strap length, and buckle width
→ Watch Strap 101 — a beginner's introduction to strap anatomy, taper, and styles
→ Shop All Straps — browse JackCoHenry's full leather strap range