Sizing Guide

Find Your Watch Strap Size

Every wrist is different, and so is every wearing preference — some like a watch snug, others a little loose. Sizing is a guide, not a guarantee, and two things drive it: the size of your wrist, and the size of your watch (its lug-to-lug length). This page helps you get both right.

Find my size Ask us instead

First — which strap are you sizing?

This guide is for two-piece straps with a buckle, where you choose a long-end / short-end length. Some of our straps size differently.

This guide

Leather & buckle straps

Two-piece straps with a pin buckle — you choose a long-end / short-end length (S, M or L). This page shows you how.

Different guide

Cut-to-Size rubber straps

One length, trimmed to your wrist after delivery. Sizing works completely differently.

Read the Cut-to-Size guide → No sizing needed

Delcro, hook & elastic straps

Adjustable by design — one size fits most wrists, no length decision required.

Shop adjustable straps →

Strap size calculator

Tell us your wrist size and roughly how big your watch is — we'll recommend a length. Based on hundreds of physical fit tests across watch and wrist sizes.

1Your wrist size

No measuring tape? Wrap a string snugly just above the wrist bone, then measure the string against a ruler.

2Your watch’s size — pick the closest match

“Lug to lug” is the full length of the watch, from the tip of the top lug to the tip of the bottom lug. Not sure? Pick the reference watch closest in size to yours.

How strap sizes are written

A strap size like "M (115/70)" is simply the long end and short end lengths in millimetres. Here's the full anatomy.

Strap measurement schematic: A lug width, B buckle width, C long end length, D short end length, E lug to middle hole, F hole spacing, G hole size

ALug width — must match your watch exactly. Find your lug width →
BBuckle width — the strap tapers from A down to B.
CLong end — the side with the holes. Controls how much “tail” you have.
DShort end — the side with the buckle. Controls where the buckle sits on your wrist.
ELug to middle hole — useful for fine-tuning custom lengths.
FHole spacing, and G hole size.

	S	M	L
C — Long end	105mm	115mm	125mm
D — Short end	65mm	70mm	75mm
E — Lug to middle hole	63mm	71mm	81mm
F — Hole spacing	6mm · 7 holes

Want the buckle to sit somewhere else?

Adjust the short end (D). A shorter D pulls the buckle around towards your wrist bone; a longer D pushes it towards the underside centre.

Too much (or too little) tail?

Adjust the long end (C). The tail is whatever extends past the buckle — a longer C gives more overhang to tuck into the keepers, a shorter C gives less.

What a well-fitted strap looks like

Our crafters' definition of a good fit, from years of sizing straps for customers.

✓The buckle or clasp sits roughly in the middle of the underside of your wrist.
✓The pin lands in the middle holes — around hole 3, 4 or 5 of 7 — not the first or last.
✓The tail tucks comfortably into both keepers. If it can’t reach the keepers, the strap is too short.
✓No heavy overhang — the tail shouldn’t extend far past the second keeper.

📷PHOTO NEEDED: wrist shot (underside visible) of a well-fitted leather strap — buckle centred on the underside of the wrist, pin in hole 3–4 of 7, tail tucked into both keepers.

Good fit

Centred buckle, middle holes, tucked tail

The buckle sits mid-wrist, the pin is in hole 4 of 7, and the tail tucks cleanly into both keepers.

📷PHOTO NEEDED: wrist shot of a too-short strap — pin in the last hole (7), tail barely past the buckle, not reaching the first keeper.

Poor fit

Too short — tail can't reach the keepers

The pin sits in the last holes and the tail can't tuck into the keepers. Size up, or lengthen the long end.

📷PHOTO NEEDED: wrist shot of a too-long strap — pin in hole 1–2, tail extending far past the second keeper and lifting away from the wrist.

Poor fit

Too long — heavy overhang

The pin sits in hole 1–2 and the tail extends well past the second keeper. Size down, or shorten the long end.

Three ways to find your length

Ranked from most to least accurate. Use the best one your situation allows.

Most accurate · You have the watch with a two-piece strap on it

Measure the strap you already wear

Wear the watch and look at three things: which hole the pin sits in, where the buckle lands on your wrist, and how much tail you have. Then:

Measure the long and short pieces of your current strap and add them together (e.g. 105mm + 80mm = 185mm).
Pick the Delugs size with the closest total — S = 170mm, M = 185mm, L = 200mm.
Adjust from observation: current strap a touch tight? Size up. Buckle pin sitting in hole 1–2? Consider a size down (or a custom short end).

Fine-tuning maths (for the particular)

To predict exactly where the pin will land: measure your current short piece, plus the distance from the lug to your most-used hole on the long piece — that total is your “working length” (e.g. 80mm + 60mm = 140mm). On any Delugs size, subtract the short end (D) from your working length and compare the remainder against the lug-to-hole distances (middle hole: S 63mm · M 71mm · L 81mm, holes 6mm apart). If no standard size puts you in holes 3–5, that’s the signal to go custom.

Good · You have the watch, but no strap to compare

Use your wrist + watch size

On a bracelet, or the original strap is long gone? Use the calculator above — your wrist circumference plus the watch’s lug-to-lug gives a reliable recommendation. A bigger watch covers more of your wrist, so it effectively “uses up” strap length — that’s why we ask for both.

Workable · You don’t have the watch yet

Estimate from the spec sheet

Buying a strap before the watch arrives? Look up the watch’s lug-to-lug in its specifications (or find it in our Strap Finder), then use the calculator. Be honest with yourself about the margin of error here — if you land near a size boundary, size up, or wait until the watch is on your wrist.

There's no universal strap length

Every watch brand ships a different default strap length — and many vary it by model. So "the strap my watch came with" isn't a reliable reference point, and a length that worked on one watch may wear differently on another. When in doubt, measure rather than assume.

Beyond S, M and L

Any length, made to measure

Our standard sizes fit most wrists, but they're not the limit. If your wrist falls outside the standard range, you're particular about tail length, or you know exactly which hole you want the pin to sit in — we'll craft the long and short end to the millimetre.

Order a custom strap Chat with us first

Ordering custom? Have these ready:
• Long end length (C), in mm
• Short end length (D), in mm
• Your lug width (A)

Pairing with a deployant clasp? The clasp changes how the strap wraps — lengths that work with a pin buckle may not translate directly. Chat with us and we’ll size it for you.

Sizing questions, answered

The questions we hear most from customers choosing a length.

I'm between two sizes — which should I pick?

Size up. A slightly longer tail is more comfortable and easier to live with than a strap that runs tight. This is also what our crafters recommend when a wrist measurement lands right on a size boundary.

My wrist is smaller or larger than the standard range

Standard S–L covers most wrists (roughly 14.5–20cm, depending on your watch's size). Outside that — or if the calculator recommends an XS or XL length — order a custom-length strap and we'll craft the long and short end to the millimetre.

Does a deployant clasp change my size?

Yes. A deployant clasp wraps around your wrist differently from a pin buckle, so the same long/short lengths can wear noticeably differently. If you're pairing a strap with a deployant clasp and you're particular about fit, chat with us before ordering and we'll size it for you.

Do all watch brands use the same strap length?

No — there's no industry standard. Every brand ships a different default length, and many vary it across models. That's why we publish our exact measurements (long end, short end, hole positions) rather than just S/M/L labels.

What if the size I ordered doesn't fit?

We offer easy returns and exchanges — reach out via live chat or see our returns policy. One note: custom-length straps are made to order, so double-check your measurements (or chat with us) before placing a custom order.

How do I measure my wrist without a measuring tape?

Wrap a piece of string snugly around your wrist just above the wrist bone — snug, not tight, with no extra slack. Mark where it overlaps, then measure the string against a ruler. That's your wrist circumference.

Is strap size the same as lug width?

No — they're two different measurements, and you need both right. Lug width (the gap between your watch's lugs) must match your watch exactly for the strap to attach. Strap size (S/M/L) is about length, and depends on your wrist. See our lug width guide for the first one.