How to Measure Your Watch Strap Size (Complete 8–26mm Guide)
Choosing the correct replacement watch strap starts with one simple step – measuring your watch strap size correctly. Whether you are replacing a worn strap or upgrading your watch’s style, knowing your lug width ensures the new strap fits securely and looks perfectly balanced.
At Chrono Straps UK, we stock a wide range of replacement watch straps from 8mm to 26mm, including leather, nylon hook and loop straps, and stainless steel bracelets designed to fit many popular watches.
This guide explains exactly how to measure your watch strap size and choose the right replacement.
Understanding Watch Strap Size
The most important measurement when buying a new strap is the lug width.
The lug width is the distance between the two lugs on your watch case where the strap attaches.
It is always measured in millimeters (mm).
Common strap sizes include:
- 16mm – smaller watches and vintage styles
- 18mm – classic dress watches
- 20mm – one of the most popular modern sizes
- 22mm – common for sport watches and divers
- 24mm+ – larger watches
If the strap width does not match your watch’s lug width exactly, it will not fit correctly.
Tools You Can Use to Measure Strap Size
You don’t need specialist equipment to measure your watch strap size.
Ruler
A simple ruler can measure the distance between the lugs.
Digital Calipers
Calipers provide the most accurate measurement and are often used by watchmakers.
Existing Strap
Many watch straps have the size printed on the back (for example 20mm or 22mm).
If the size is visible, you can simply order the same width replacement.
Step-by-Step Guide to Measuring Lug Width
Follow these simple steps:
1. Remove the Existing Strap
Use a spring bar tool to detach the strap from the watch case.
2. Measure the Distance Between the Lugs
Place your ruler or calipers between the lugs and measure the internal gap.
3. Record the Measurement
The measurement in millimeters is your strap width.
For example:
- 20mm gap = 20mm watch strap
- 22mm gap = 22mm watch strap
Choosing the Right Replacement Watch Strap
Once you know your strap size, the next step is choosing a style.
At Chrono Straps UK we offer several popular strap options.
Budget Replacement Watch Straps
Ideal for everyday use and quick strap upgrades.
Explore our range:
https://www.chronostraps.co.uk/collections/budget-watch-straps
Nylon Hook & Loop Straps
Lightweight, adjustable and extremely comfortable.
These straps are perfect for sports watches and everyday wear.
Browse the collection:
https://www.chronostraps.co.uk/collections/hook-loop
Swatch Compatible Watch Straps
Swatch watches use unique strap fittings and require compatible replacements.
See the range here:
https://www.chronostraps.co.uk/collections/swatch®-compatible-watch-straps
Don’t Forget the Spring Bars
Spring bars are the small metal pins that hold your strap in place.
When replacing a strap it is always a good idea to check the condition of the spring bars.
High-quality double flanged spring bars make installation much easier.
Recommended option:
https://www.chronostraps.co.uk/products/stainless-steel-double-flanged-spring-bars-1-5mm
Tips for Choosing the Perfect Strap
When selecting a replacement strap, consider:
Material
- Leather – classic and elegant
- Nylon – lightweight and sporty
- Stainless steel – durable and modern
Comfort
Make sure the strap length suits your wrist size.
Watch style
Match the strap material with your watch case for the best appearance.
Frequently Asked Questions
How do I know what size watch strap I need?
Measure the lug width between the watch lugs in millimetres. The replacement strap must match this size exactly.
Are watch straps universal?
Most watches use standard lug widths, so many replacement straps are interchangeable.
What are the most common watch strap sizes?
20mm and 22mm are the most common sizes for modern watches.
Can I replace my watch strap at home?
Yes. With a simple spring bar tool, most watch straps can be replaced in minutes.
Final Thoughts
Measuring your watch strap size correctly ensures you choose a strap that fits securely and looks great on your watch.
Once you know your lug width, replacing your strap becomes quick and easy.
Ready to upgrade your watch? Explore the full range of replacement watch straps at Chrono Straps UK today.
https://www.chronostraps.co.uk/collections/budget-watch-straps