Watch size guide: how to measure wrist size for a watch and choose what fits

Watch size guide: how to measure wrist size for a watch and choose what fits

How to measure your wrist for a watch, a size chart in which every number names its source, and what case size and lug-to-lug mean, with 34 to 38 mm watches for small wrists.

To work out how to measure wrist size for a watch, wrap a paper strip, string or soft tape round the wrist where the watch will sit, mark where it meets, and read the length against a ruler in centimetres and inches. Then find that number in the chart below and check lug-to-lug as well as diameter.

We are launching a 38 mm watch ourselves, so we have an interest here: every number below comes from a named source or a maker's own specification, apart from arithmetic we label as ours, and we say where the guides disagree. The Vannin Field Watch is coming soon. This page uses measurements, not photographs of watches on wrists.

How to measure wrist size for a watch

Here is how to measure your wrist for a watch: wrap a flexible tape, or a strip of paper or string, round the wrist where the watch will sit, snug but not tight, mark the overlap, then read it against a ruler and write it down in both centimetres and inches.

Gather a flexible tape measure. If you do not have one, a strip of paper or a piece of string, a pen and a ruler will do; WatchGecko and Formex both describe this method. Choose the wrist and the spot: measure at the spot where you would wear the watch, beside the wrist bone. Wrap the tape, paper or string round the wrist, snug but not tight. Formex advises leaving room for movement and for the wrist to swell a little during the day. Mark where the ends overlap, lay the strip flat against a ruler and read the length. Write it down in centimetres and inches. Use that snug figure for the chart below. Strap length may need extra: WatchGecko suggests about 1 cm more for a bracelet and about 2 cm for leather, and Second Movement adds 1 to 2 cm for a looser fit. We suggest keeping that allowance out of the chart lookup.

Handy conversions (1 inch is 2.54 cm): 6 in is 15.2 cm, 6.5 in is 16.5 cm, 7 in is 17.8 cm, 7.5 in is 19.1 cm and 8 in is 20.3 cm.

Measure the flat top of your wrist as well

Wrist Enthusiast points out that a rounder wrist has less flat surface on top, so a watch looks and feels larger on it, while a flatter wrist is a broader platform for the same watch.

To find your flat top, hold a ruler across the top of the wrist, over the flat part where the case rests, and note the width in millimetres. WatchGecko's guide measures wrist width the same way. Shinola offers a shortcut, the circumference in millimetres divided by three, but a direct measurement is better.

Watch size chart: what size watch for my wrist

For a wrist of 6.5 to 7 inches (16.5 to 17.8 cm), two guides suggest case diameters of 38 to 42 mm and one gives 46 to 50 mm lug-to-lug; smaller and larger wrists shift both ranges, and the guides disagree at the edges, so treat the chart as a starting range, not a verdict.

Published watch sizing advice is easier to compare in one place, so the tables below set each guide's wrist-size bands side by side.

Rules of thumb, not standards. We found no standards body or industry body that publishes a rule linking wrist size to watch size. Each column below is one named publisher's guidance.

"No entry" means that guide gives no range for that band, not that no watch suits it.

Time+Tide's Zach Blass, writing in July 2024 about his own smaller wrist, gives about 45 mm for dressy watches and 46 to 48 mm for sporty ones as his preferred lug-to-lug, and rules out 50 mm or more for himself. That is one writer's preference, so we have kept it out of the table. His piece is Time+Tide on why lug-to-lug matters.

• Time+Tide on why lug-to-lug matters

Where the guides disagree

Second Movement gives 34 to 38 mm for a 6 to 6.5 in wrist, but Shinola starts at 38 mm for 6 to 7 in. For 7 to 7.5 in, Second Movement says 42 to 45 mm and Shinola has no entry. Gnomon says a 42 mm case with a 49 mm lug-to-lug can sit well on a small wrist, without giving a wrist measurement. Oracle of Time's ceiling under 6.5 in is 47 mm. Wrist Enthusiast says there is no universal diameter answer. On thickness, Jewelers Mutual suggests under 10 mm for wrists under 6 in, while WatchGecko labels 10 to 12 mm as average. These are different kinds of statement, so read them as context, not a conflict.

What size watch for a 7 inch wrist?

A 7 in (17.8 cm) wrist sits on the edge of two Second Movement bands (38 to 42 mm and 42 to 45 mm), inside Shinola's 38, 40 or 42 mm range and at the top of Oracle of Time's 46 to 50 mm band, which gives way to 50 mm and beyond from 7 in. So the sources point to roughly 38 to 45 mm and about 46 to 50 mm lug-to-lug. Before you settle on a number, check your flat top.

If you have measured your flat top

Shinola's rule is that a case diameter of 60 to 75% of the flat top looks proportional, and that lug-to-lug should be 75 to 95% of it. Table 2 applies those percentages to three widths. They are one maker's percentages. Second Movement and Jewelers Mutual add that lug-to-lug should not exceed the width of the wrist.

The upper lug-to-lug figures in the 55 and 60 mm rows (52.3 and 57 mm) reach or pass the 52 to 53 mm at which Wrist Enthusiast's author sees overhang on his 6.75 in wrist (Table 1b), so do not blend the two.

Watch sizes explained: case diameter, thickness and lug width

Watch face size, also called case size, is the diameter of the case in millimetres, and it is only one of four size measurements: case diameter, thickness, lug-to-lug and lug width. Timex's guide, for one, gives its case-size ranges as diameters, so check which measurement a listing means before you compare watches. Watches do come in many sizes; WatchGecko puts typical diameters at 28 to 46 mm.

On the crown: Daniel Wellington and Pinion both say their diameters exclude it, and so does Timex's product page. Many makers do not say either way, so compare like with like.

On thickness: Timex and Gnomon measure from the top centre of the crystal to the middle of the case back, while Daniel Wellington measures from the back of the case to the top of the crystal. Baltic lists its Aquascaphe Classic as 13 mm, or 11 mm without the glass. Beaucroft and Vannin state theirs include the crystal. WatchGecko's bands are:

Under 9 mm: slim. 10 to 12 mm: about average. Over 13 mm: thick.

WatchGecko leaves 9 to 10 mm and 12 to 13 mm unassigned. Profile matters as much as the number: Wrist Enthusiast argues that how the case steps from caseback to bezel changes how a given thickness feels. The Field Watch's published 11.2 mm falls in the band WatchGecko calls average.

Footprint is our arithmetic: the diameter squared, divided by 38 squared. In these two guides, 38 mm is the shared edge of Second Movement's 6 to 6.5 in and 6.5 to 7 in bands and the smallest size in Shinola's 6 to 7 in range.

• Lug-to-lug
• Lug width

Men's and women's watch sizes: what the labels mean

Labels vary by seller. Table 5 shows that the men's range starts at 38, 39 or 40 mm, and the women's range tops out at 34, 36 or 40 mm. Shinola says 38 to 42 mm suits several genders, so choose by wrist and lug-to-lug rather than by label.

Is a 38 mm watch too small? It is the bottom of the 38 to 46 mm men's range at Alpina, Gnomon and Timex, and it sits inside Shinola's multi-gender 38 to 42 mm. Whether it is too small depends on your wrist and your taste.

Lug-to-lug: the measurement that decides fit

Lug-to-lug is the length of a watch from the tip of the upper lug to the tip of the lower lug, and for many wearers it decides fit more than diameter does, because a watch can be wide without trouble but overhangs once it is too long for the wrist.

The five 38 mm watches in Table 6 run from 43.5 to 47 mm lug-to-lug, and the 36 mm Nomos (44.3 mm) is longer than the 38 mm Beaucroft (43.5 mm). Oracle of Time makes the same point: a 40 mm watch with long lugs can come across as bigger than a 42 mm watch with shorter ones. Second Movement and Jewelers Mutual say lug-to-lug should not exceed wrist width.

For how to measure it yourself, see watch lugs explained: lug-to-lug, lug width and why they decide fit.

• watch lugs explained: lug-to-lug, lug width and why they decide fit

How should a watch fit on your wrist?

A watch should sit centred on the top of the wrist, beside the wrist bone, with the lugs inside the edges of the wrist and room to slide one finger under the strap. Precision Watches suggests a tighter fit for exercise and a slightly looser one for daily wear.

One finger under the strap: Timex and Jewelers Mutual both use this test. If you cannot slide a finger in, it is too tight; Timex says more than about an inch of side-to-side movement is too loose. No visible gap between the lugs and the wrist when you look from the side (Jewelers Mutual). Tighter for exercise, slightly looser for daily wear (Precision Watches). Leather softens with wear and may need retightening (Timex). Allow about 1 cm of extra length for a bracelet and about 2 cm for leather (WatchGecko). Thinner cases slip under cuffs, and taller cases can catch on clothing (Second Movement).

A worked example: 38.0 mm, 46.0 mm, 11.2 mm and 20.0 mm

Using the Vannin Field Watch's published numbers (38.0 mm diameter, 46.0 mm lug-to-lug, 11.2 mm thick including the crystal, 20.0 mm lug width), the ranges that Second Movement, Shinola, Oracle of Time and Wrist Enthusiast publish for wrists of roughly 6 to 7 inches (15.2 to 17.8 cm) include or touch these numbers, with caveats at each end.

The Field Watch is coming soon. If the term is new to you, we explain what a field watch is separately. This is the only kind of fit statement we make: a named source, its range, and where our published numbers fall.

Diameter: Second Movement's range for a 6 to 6.5 in wrist is 34 to 38 mm and for 6.5 to 7 in is 38 to 42 mm, so 38.0 mm is the top edge of one and the bottom edge of the other. Shinola's range for 6 to 7 in is 38, 40 or 42 mm, and 38.0 mm falls inside it. Lug-to-lug: Oracle of Time says to stay below 47 mm under 6.5 in, and 46.0 mm is below that. Its band for 6.5 to 7 in is 46 to 50 mm, so 46.0 mm is at the bottom of it. Wrist Enthusiast's author gives about 45 to 50 mm for his 6.75 in (17.1 cm) wrist and sees overhang from about 52 to 53 mm, so 46.0 mm falls inside the first range and under the second. Time+Tide's Zach Blass rules out 50 mm or more for his own wrist, and 46.0 mm is under that. Proportions: both of Shinola's rules hold for a flat top of 50.7 to 61.3 mm (our arithmetic). Using Shinola's circumference shortcut, that is a wrist of about 6.0 to 7.2 in (15.2 to 18.4 cm). Thickness: 11.2 mm falls in the 10 to 12 mm band that WatchGecko calls average. Lug width: 20.0 mm is 52.6% of the 38.0 mm diameter (our arithmetic), near Shinola's rule that strap width is about half the case diameter.

Now the caveats. For wrists under about 6 in (15.2 cm), Jewelers Mutual suggests a diameter under 38 mm and a thickness under 10 mm, and the Field Watch's published numbers are neither.

Three of the other 38 mm watches in Table 6 have a shorter lug-to-lug (Beaucroft 43.5 mm, Seiko 44.2 mm and Vaer 45 mm), so a reader with a small wrist, or a flat top near 50 mm, should compare those numbers; watch lugs explained: lug-to-lug, lug width and why they decide fit shows how.

At the other end, for 7 to 7.5 in Second Movement's band is 42 to 45 mm, and for 7 in and over Oracle of Time says 50 mm and beyond. Both are above the Field Watch's 38.0 mm and 46.0 mm.

Measure your own wrist and compare; the numbers matter more than our opinion. If you are curious about the style, the Journal tells why a field watch was Vannin's first watch. Figure 1 above shows the four measurements to scale.

• Vannin Field Watch
• what a field watch is
• watch lugs explained: lug-to-lug, lug width and why they decide fit
• why a field watch was Vannin's first watch

Watches for small wrists, including 38mm picks

Wrist Enthusiast puts a small wrist at under 6.5 inches (16.5 cm); for it, the numbers to check first are lug-to-lug (Oracle of Time says stay below 47 mm) and thickness, and Second Movement's guide gives case diameters of 34 to 38 mm for 6 to 6.5 inch wrists.

What counts as a small wrist?

Wrist Enthusiast defines a small wrist as under 6.5 in (16.5 cm), and Oracle of Time's first lug-to-lug band is under 6.5 in as well. Jewelers Mutual draws the line lower: its smaller-wrist advice is for wrists under 6 in (15.2 cm). Searches often single out one sex, but the numbers in this guide apply to any wrist.

38mm watches, plus a few smaller: eight to look at

People search for the best 38mm watches. This is an alphabetical shortlist built from each maker's own published specification, not a ranking. Vannin is on this list; we have put ourselves last and the Field Watch is coming soon. The list runs from 34 to 38 mm, so it includes 34 and 36 mm watches for readers who need a shorter lug-to-lug.

The lug-to-lug minus diameter column is our arithmetic. Thickness definitions vary: Beaucroft and Vannin state theirs include the crystal, and Christopher Ward and Nomos call theirs height. Christopher Ward's price is from its international page. Nomos's specifications and price are both on its reference 717 page, which also states a delivery time of 3 months. Vaer labels its $699 a sale price and shows no other price.

Beaucroft, The Arc: 38 mm, 43.5 mm lug-to-lug, 10.3 mm including crystal, 20 mm lugs, Miyota 9039 automatic. Worth a look for the shortest lug-to-lug among the 38 mm watches listed. The maker states shipping takes 2 to 3 weeks from order.

Christopher Ward, C63 Sealander Automatic 36 mm: 36 mm, 42 mm lug-to-lug, 10.9 mm height, 20 mm lugs, Sellita SW200-2 Power+ automatic. Worth a look for the shortest lug-to-lug among the automatics. The $1,430.00 price is from the maker's international page.

Hamilton, Khaki Field Mechanical 38 mm: 38 mm, 9.5 mm thick, 47 mm lug-to-lug, 20 mm lugs, H-50 mechanical movement with an 80-hour power reserve. Worth a look if thickness matters more than length. Its lug-to-lug is the longest among the 38 mm watches listed; the maker states 5 bar (50 m).

Nomos Glashütte, Club Campus: 36.0 mm, 8.2 mm thick, 44.3 mm lug-to-lug, manual-winding DUW 4001. Worth a look for the thinnest case listed. The lug width is 18 mm, not 20, so check strap compatibility; the maker states a delivery time of 3 months.

Seiko, Seiko 5 Sports SRPK29: 38.0 mm, 44.2 mm lug-to-lug, 20 mm lugs, 4R36 automatic with manual winding. Worth a look for a published lug-to-lug under 45 mm. At 12.1 mm it has the thickest published figure among the 38 mm watches listed; Hardlex crystal, 10 bar.

Timex, Marlin Quartz 34 mm: 34 mm, 41 mm lug-to-lug, 10.5 mm thick, 18 mm lugs, quartz analogue movement. Worth a look for the smallest case and shortest lug-to-lug listed. The maker lists an acrylic crystal and 30 m of water resistance.

Vaer, A5 Atlas Black Auto 38 mm: 38 mm, 45 mm lug-to-lug, 11 mm thick, 20 mm lugs, Miyota 9015 automatic, sapphire crystal. Worth a look for a 45 mm lug-to-lug with a 100 m rating. The $699 price is for the page's base strap option.

Vannin, Field Watch (coming soon): 38.0 mm, 46.0 mm lug-to-lug, 11.2 mm including crystal, 20.0 mm lugs, Miyota 9039 automatic, £399. Its lug-to-lug is longer than Beaucroft's, Seiko's and Vaer's and shorter than Hamilton's. Visitors can register their interest on the Field Watch page.

Not every maker publishes lug-to-lug. Timex's hand-wound Marlin 34 mm and Tissot's PRX 35 mm give diameter and thickness but no lug-to-lug on the pages we checked, so ask the maker before buying and do not infer it from the diameter. For more makers, see our guide to British microbrand watches.

Prices and specifications checked October 2026. Tell us if something has changed.

• Beaucroft, The Arc
• Christopher Ward, C63 Sealander Automatic 36 mm
• Hamilton, Khaki Field Mechanical 38 mm
• Nomos Glashütte, Club Campus
• Seiko, Seiko 5 Sports SRPK29
• Timex, Marlin Quartz 34 mm
• Vaer, A5 Atlas Black Auto 38 mm
• Vannin, Field Watch
• register their interest
• British microbrand watches

Frequently asked questions

How do I measure my wrist for a watch? Wrap a soft tape, or a strip of paper or string, round your wrist where the watch will sit, snug but not tight. Mark the overlap, lay the strip against a ruler and write down the length in centimetres and inches. We suggest using that snug figure for the chart; WatchGecko adds about 1 cm for a bracelet or 2 cm for leather when you choose strap length.

What size watch for my wrist? For a wrist of 6.5 to 7 inches (16.5 to 17.8 cm), Second Movement suggests 38 to 42 mm, Shinola gives 38, 40 or 42 mm, and Oracle of Time gives 46 to 50 mm lug-to-lug. Second Movement's neighbouring bands are 34 to 38 mm and 42 to 45 mm. These are rules of thumb, and the guides disagree at the edges.

How big should a watch be on your wrist? Shinola's rule is a case diameter of 60 to 75% of the flat top of your wrist and a lug-to-lug of 75 to 95%, with the flat top roughly the circumference divided by three. Second Movement and Jewelers Mutual add that lug-to-lug should not exceed wrist width. For a 55 mm flat top, Shinola's rule gives a case of 33 to 41.3 mm (our arithmetic).

How should a watch fit on your wrist? A watch should sit centred on top of the wrist, beside the wrist bone, with the lugs inside the edges of the wrist. Timex's one-finger rule says you should be able to slide a finger under the strap, and that more than about an inch of side-to-side movement is too loose. Precision Watches suggests tighter for exercise and slightly looser for daily wear.

What is a case size on a watch? Case size is the diameter of the case in millimetres, measured across the case; many searchers call the same thing watch face size. Some makers measure it without the crown, including Daniel Wellington and Pinion, while many do not say either way. It is one of four size numbers, alongside thickness, lug-to-lug and lug width.

How are watches measured? Makers usually quote four measurements, often taken with a calliper: case diameter, thickness, lug-to-lug and lug width. They differ on whether thickness includes the crystal, so check the wording. Strap length is a separate measurement, based on your wrist. Table 3 above sets out all four case measurements side by side.

Is my wrist too small for a watch? None of the guides we checked sets a minimum wrist size. They shift the emphasis instead: Oracle of Time says to stay below 47 mm lug-to-lug under 6.5 inches, and Jewelers Mutual suggests under 38 mm and under 10 mm thick for wrists under 6 inches. Makers publish lug-to-lug of 41 mm (Timex, 34 mm) and 42 mm (Christopher Ward, 36 mm).

For more on lug measurements, read watch lugs explained: lug-to-lug, lug width and why they decide fit.

Alpina: watch size guide; Baltic: Aquascaphe Classic; Daniel Wellington: how to measure a watch; Formex: how to measure your wrist size; Gnomon Watches: watch size guide; Jewelers Mutual: how should a watch fit; Oracle of Time: why lug-to-lug is the spec that matters; Pinion: Neutron 38mm; Precision Watches: how should a watch fit; Second Movement: choosing the right watch size for your wrist; Shinola: watch size guide; Time+Tide: why lug-to-lug is the most important measurement; Timex: watch size guide; WatchGecko: how to measure your wrist size; Wrist Enthusiast: how to choose the right watch size

These are publishers' rules of thumb, not standards; we checked them in October 2026.

Measure first, compare lug-to-lug second, and decide on the numbers. If a 38 mm watch with a 46.0 mm lug-to-lug is what you are looking for, you can register your interest in the Field Watch.

Prices and specifications checked October 2026. Tell us if something has changed.

• watch lugs explained: lug-to-lug, lug width and why they decide fit
• Alpina: watch size guide
• Baltic: Aquascaphe Classic
• Daniel Wellington: how to measure a watch
• Formex: how to measure your wrist size
• Gnomon Watches: watch size guide
• Jewelers Mutual: how should a watch fit
• Oracle of Time: why lug-to-lug is the spec that matters
• Pinion: Neutron 38mm
• Precision Watches: how should a watch fit
• Second Movement: choosing the right watch size for your wrist
• Shinola: watch size guide
• Time+Tide: why lug-to-lug is the most important measurement
• Timex: watch size guide
• WatchGecko: how to measure your wrist size
• Wrist Enthusiast: how to choose the right watch size
• register your interest

Related reading

• What a field watch is
• Watch lugs explained: lug-to-lug, lug width and why they decide fit
• British microbrand watches