Before You Order
Sizing Guide
Three measurements. Five minutes. A strap that fits perfectly the first time.
Measurement 01
Lug Width
The most important measurement. Lug width is the distance between the two lugs — the protruding arms at the top and bottom of your watch case where the strap attaches.
Use a digital calliper or a ruler with millimetre markings. Measure at the point where the spring bar passes through — this is typically at the inner edge of the lugs, not the outer tip. If you are between sizes, size down.
We make: 16 · 17 · 18 · 19 · 20 · 21 · 22 · 24mm
Measure at the spring bar, inner lug edge
Measurement 02
Strap Length
A watch strap has two ends. The long end passes through the buckle and carries the holes. The short end holds the buckle.
| Size | Long End | Short End | Wrist |
|---|---|---|---|
| Short | 110mm | 65mm | Under 155mm |
| Regular | 120mm | 75mm | 155 – 190mm |
| Long | 130mm | 85mm | 190mm+ |
To measure your wrist, wrap a tailor’s tape or a strip of paper around your wrist just below the wrist bone. Where the end meets the strip — that is your wrist circumference. Most adults fall in the Regular range.
Measurement 03
Taper & Buckle Width
Most straps taper from the lug width to a narrower buckle end. A 20mm strap, for example, typically tapers to 18mm at the buckle. This is denoted as 20/18.
Our standard tapers are listed on each product page. If you have an existing buckle you want to reuse, measure its inner pin width — that is the buckle width you need. Custom tapers are available on request.
| Lug Width | Standard Taper |
|---|---|
| 18mm | 18/16 |
| 19mm | 19/16 |
| 20mm | 20/18 |
| 22mm | 22/20 |
| 24mm | 24/22 |
Lug width / Buckle width
Quick Reference
Common Lug Widths
Not sure of your watch’s lug width? Find your reference below. When in doubt, check your watch manufacturer’s website or measure directly — references can vary by year and variant.
Rolex
| Submariner, Sea-Dweller | 20mm |
| Datejust 36 | 20mm |
| Datejust 41, Day-Date 40 | 20mm |
| Explorer I (36mm) | 20mm |
| GMT-Master II | 20mm |
Omega
| Speedmaster Professional | 20mm |
| Seamaster 300M (42mm) | 20mm |
| Seamaster Aqua Terra | 20mm |
| Constellation 39mm | 18mm |
| De Ville Prestige | 18mm |
IWC · Tudor · TAG
| IWC Pilot’s Watch Mark XX | 20mm |
| IWC Portugieser 40 | 20mm |
| Tudor Black Bay 41 | 22mm |
| Tudor Black Bay 36 | 19mm |
| TAG Heuer Carrera | 20mm |
Still Not Sure?
Tell us your watch make and model in the order notes, or drop us a message before you order. We would rather take five minutes to confirm the fit than have you receive something wrong.