Upgrading your watch with a new leather, NATO, or metal strap starts with the perfect measurement. Our Watch Strap Calculator helps you identify your watch's 'lug width'—the space between the case horns where the strap attaches. We also provide a length guide based on your wrist size, ensuring you avoid overly long straps or uncomfortably tight fits. It's the essential tool for watch enthusiasts and collectors.
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Watch Strap Size Converter
Determine the correct watch strap width (lug width) and band length for your wrist.
Watch Fitting Tool
Measure the gap between the watch "lugs" (the points where the strap attaches) to find the correct width.
Required Strap Width20 mm
Recommended Length (Long/Short Side)120 / 80 mm (Regular)
How to Measure Your Wrist
Wrap a flexible measuring tape or a piece of string around your wrist bone. If using string, measure its length against a ruler. Do not pull too tight.
Standard Widths
The most common lug widths for men's watches are **20mm** and **22mm**. Vintage or smaller watches often use **18mm** or **19mm**.
About Watch Strap Fitting Tool
1
Measure Lug Width
Measure the gap between the watch's 'lugs' in mm.
2
Measure Wrist
Enter your wrist circumference for length recommendations.
Key Features
Lug Width Database
Identify common widths like 18mm, 20mm, and 22mm for your timepiece.
Band Length Estimator
Recommends total strap length (long/short side) based on your wrist circumference.
Taper Analytics
Explains how strap taper (e.g., 20mm to 16mm) affects buckle size requirements.
Frequently Asked Questions
18mm, 20mm, and 22mm are the most standard sizes for modern watches.
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