⌚ Watch Strap & Bracelet Buying Guide

Buying a replacement strap or bracelet for your watch comes down to two measurements: your lug width, and your wrist size (your strap width at the buckle end, if you want to keep your current buckle). Get those right, and any strap will fit perfectly. This guide walks you through every step — from measuring your watch to choosing the right strap type, taper, and buckle.

🔗 Browse our full strap & bracelet collection

Watch sizing reference diagram. Download the free printable PDF to measure at home.

🔧 Step 1 — Find Your Lug Width

The lug width is the measurement of the inner gap between the two lugs on your watch — the space where the strap end slides in and the spring bar sits. It is always measured in millimeters and is the number you need when ordering any strap or bracelet.

Lug width is a fixed specification of the watch. It does not change based on the strap you choose. The most common lug widths are 16mm, 18mm, 19mm, 20mm, 21mm, and 22mm, though other sizes exist.

How to Measure Your Lug Width

1. Turn the watch over so you can see the lug area where the strap attaches.
2. Use a digital caliper or a millimeter ruler.
3. Measure the inner gap between the two lugs at the point where the spring bar sits.
4. No caliper? Use our free printable lug width tool — print at 100% scale and place your watch lug end over it to read the measurement directly.

📐 Step 2 — Straight, Tapered & Super Tapered Straps

Once you know your lug width, you need to choose the strap profile. This refers to whether the strap stays the same width from end to end, or narrows as it goes from the watch to the buckle. The taper is a property of the strap — not the watch.

Every strap has two ends: the lug end (the wide end that attaches to the watch) and the tail end (the end that passes through the buckle). The difference in width between these two ends defines the strap profile.

Common Strap Width Combinations

The lug width is your watch’s fixed measurement — the tail width is your strap choice.

🔐 Step 3 — Buckle Width & Clasp Types

The buckle width must match the tail end width of your strap — not the lug width. This is the most commonly overlooked measurement. If your strap tapers from 20mm at the lug end to 16mm at the tail end, you need a 16mm buckle.

How to Identify Your Buckle Width

1. Measure the inner opening of the buckle — the gap that the strap tail passes through.
2. This number should match the width of the tail end of your strap.
3. If you are keeping an existing buckle and buying a new strap, measure the buckle inner width as well — then order a strap with a matching tail width and lug width.

Buckle & Clasp Types

• Tang Buckle (Pin Buckle) — The standard buckle. A metal frame with a pin that passes through a hole in the strap tail. Simple, reliable, and the most common type on vintage watches. Width must match the strap tail end.
• Deployant Clasp (Butterfly Clasp) — A folding clasp that opens like butterfly wings. More secure than a tang buckle and easier to open one-handed. Common on Rolex, Omega, and Breitling bracelets. Width must match the strap tail end.
• Push-Button Deployant — A deployant clasp with push-button releases on both sides. The most secure and convenient option. Standard on many modern Swiss sport watches.
• Ratchet / Micro-Adjust Clasp — Found on mesh and Milanese bracelets. Slides to any position for a precise fit. No holes or tail width required.

📍 Step 4 — Wrist Size & Strap Length

Strap length determines how many adjustment holes you’ll have and whether the strap fits your wrist comfortably. Most straps are listed as two numbers — for example, 75mm / 120mm. The short end has the buckle and sits on the inside of your wrist. The long end has the holes and wraps around to pass through the buckle.

How to Measure Your Wrist

1. Wrap a flexible tape measure or a strip of paper around your wrist just below the wrist bone — where you normally wear a watch.
2. Note the measurement in millimeters.
3. Add 10–15mm for a comfortable fit.

📊 Lug Width by Brand — Reference Chart

The lug width is a fixed measurement of the watch. Use this chart as a starting point — always verify by measuring your specific watch, as lug widths can vary by reference and production year.

🔗 Strap & Bracelet Types

The right strap type depends on your watch style, how you wear it, and whether water resistance matters. All strap types are available in straight or tapered profiles — choose based on your watch and personal preference.

⚡ Quick-Release Straps — Swap in Seconds, No Tools Needed

🧪 Strap Materials at a Glance

🔄 How to Change a Watch Strap

Standard Strap — Spring Bar Tool Required

1. Place the watch face-down on a soft cloth to protect the crystal.
2. Insert the forked end of a spring bar tool between the lug and the strap end.
3. Press the spring bar inward to compress it, then slide the strap end out of the lug.
4. Repeat on the other side to fully remove the strap.
5. To install the new strap, compress one end of the spring bar, seat it in one lug hole, then compress the other end and snap it into the opposite lug hole.
6. Tug gently to confirm both spring bars are fully seated.

Quick-Release Strap — No Tools Required

1. Locate the small lever on the inside of the strap end near the lug.
2. Press the lever inward with your fingernail or a pen tip.
3. Slide the strap end out. The spring bar stays in the watch.
4. To install, align the quick-release bar with the lug holes and press until it clicks into place.
5. Tug gently to confirm it is locked.

🛠️ Free Printable Sizing Tools

❓ Frequently Asked Questions

Browse our full collection of watch straps & bracelets and vintage watches.