
Watch 101
Find your wrist in the first table and read across. The tables below it adjust the range for case style, cover women's sizing and strap length, and place well known watches on the chart.
Prices checked October 9, 2026Compared across brandsHow we choose

These charts are starting points, built from the proportions that look balanced on most wrists of each size. They assume you know your wrist circumference, measured just above the wrist bone. If you have not measured yet, or want the reasoning behind the numbers, read how to choose the right watch size first; this page is the quick reference.
Two columns matter in every table. Case diameter is the width across the case without the crown. Lug to lug is the length from tip to tip of the lugs, and it is the hard limit: if it is longer than the flat top of your wrist, the watch overhangs regardless of its diameter.
For a round, three hand sports or everyday watch with ordinary lugs.
| Wrist (inches) | Wrist (cm) | Case diameter | Lug to lug, up to about | Lug width |
|---|---|---|---|---|
| 5.5 | 14.0 | 32 to 36mm | 42mm | 16 to 18mm |
| 6.0 | 15.2 | 34 to 38mm | 44mm | 18mm |
| 6.5 | 16.5 | 36 to 40mm | 46mm | 18 to 20mm |
| 7.0 | 17.8 | 38 to 42mm | 48mm | 20mm |
| 7.5 | 19.1 | 40 to 44mm | 50mm | 20 to 22mm |
| 8.0 | 20.3 | 42 to 46mm | 52mm | 22mm |
| 8.5 and up | 21.6 and up | 44 to 48mm | 54mm | 22 to 24mm |
Ranges are guidance. A flat, wide wrist can go one step up; a round, narrow one may prefer one step down.
Price tracker · prices checked October 9, 2026
What one watch has cost over time, listed and per watch while the store ran its offer.
Take your range from Chart 1, then shift it by the amount below. Shapes that fill more of the wrist, and styles meant to be discreet, move down; tool watches with wide bezels can move up.
| Style | Adjustment | Why |
|---|---|---|
| Dress watch, thin bezel | Subtract 2 to 3mm | Large white dials look bigger, and dress watches should slip under a cuff |
| Everyday three hand | As charted | The baseline for Chart 1 |
| Integrated bracelet sports watch | Subtract about 2mm | Case and bracelet read as one wide shape |
| Octagonal or cushion case | Subtract 1 to 2mm | The corners fill space a round case leaves empty |
| Chronograph | Add up to 2mm | Subdials need room; small chronographs look crowded |
| Dive style with rotating bezel | Add 1 to 2mm | The bezel eats into the dial, so it reads smaller |
| Pilot style | Add up to 2mm | Large legible dials are the point of the style |
Example: a 6.5 inch wrist takes 36 to 40mm from Chart 1. For a dress watch that becomes roughly 34 to 38mm; for a dive style watch, 37 to 42mm.
Rectangular watches are listed as width by length, and it is the length, measured along the arm, that has to fit the wrist. Square cases wear about two sizes larger than their width suggests.
| Wrist (inches) | Square case width | Rectangular case (width by length) |
|---|---|---|
| 5.5 to 6.0 | 20 to 28mm | about 20 by 28mm to 24 by 32mm |
| 6.0 to 6.5 | 26 to 33mm | about 24 by 32mm to 27 by 36mm |
| 6.5 to 7.0 | 30 to 36mm | about 27 by 36mm to 30 by 40mm |
| 7.0 to 7.5 | 33 to 38mm | about 30 by 40mm to 33 by 44mm |
| 7.5 and up | 36 to 42mm | about 33 by 44mm and larger |
Traditional women's sizing runs smaller, and jewelry style watches smaller still. Many women wear the men's ranges in Chart 1, especially for sports and integrated bracelet designs; this table follows the classic conventions.
| Wrist (inches) | Wrist (cm) | Dainty or jewelry style | Classic women's | Boyfriend or unisex look |
|---|---|---|---|---|
| 5.0 | 12.7 | 16 to 22mm | 24 to 28mm | 32 to 34mm |
| 5.5 | 14.0 | 18 to 24mm | 26 to 30mm | 33 to 36mm |
| 6.0 | 15.2 | 20 to 26mm | 28 to 32mm | 35 to 38mm |
| 6.5 | 16.5 | 22 to 28mm | 30 to 34mm | 36 to 40mm |
| 7.0 and up | 17.8 and up | 24 to 30mm | 32 to 36mm | 38 to 42mm |
Small round or oval dials on fine bracelets, such as the Lucky Fours Tyla on its thin gold mesh, sit in the dainty column. For picks in that size class, see small watches for women and slim wrists.
Case diameters as listed by each brand, mapped to the wrist range where Chart 1 or Chart 4 places them. Use a watch you can try on in a store as a reference point for one you cannot.
| Watch | Case* | Price* | Fits wrists of about |
|---|---|---|---|
| Citizen Corso | 27mm | $340 | 5.0 to 6.0 in (women's classic) |
| Seiko Essentials | 30mm | $265 | 5.5 to 6.5 in (women's classic) |
| Tissot PRX 35mm | 35mm | $575 | 5.5 to 6.5 in |
| Casio MTP1302D Dress Watch | 38.5mm | $89.95 | 6.0 to 7.0 in |
| Timex Q Continental 39mm | 39mm | $179 | 6.0 to 7.0 in |
| Tissot PRX 40mm | 40mm | $450 | 6.5 to 7.5 in |
| Seiko 5 Sports | 42.5mm | $350 | 7.0 to 8.0 in |
| Citizen Promaster Dive Chronograph | 45mm | $440 | 7.5 in and up |
*as listed on each brand's US website, October 2026
A watch can be the right size and still fit badly if the band is wrong. Two piece straps are usually sold in three lengths, given as the long side and short side in millimeters.
| Wrist (inches) | Strap length | Typical sizing (long by short side) |
|---|---|---|
| 5.5 to 6.5 | Short | about 110 by 70mm |
| 6.5 to 7.5 | Regular | about 120 by 75mm |
| 7.5 to 8.5 | Long | about 130 by 80mm |
Steel bracelets usually arrive long and are shortened by removing links, ideally the same number from each side of the clasp so the case stays centered. Our step by step guide to adjusting a watch bracelet covers the tools. If you are buying for someone else and cannot measure, the sizing advice in how to give a watch as a gift helps you choose a safe middle size.
A 7 inch (17.8 cm) wrist usually suits a round sports watch of about 38 to 42mm, with a lug to lug of up to roughly 48mm. Dress watches look best at the lower end of that range.
Around 34 to 38mm for a men's style round watch, or roughly 26 to 32mm for a women's style watch, with a lug to lug under about 44mm.
Wrap a strip of paper or a piece of string around the wrist just above the wrist bone, mark the overlap and measure it flat with a ruler. Our guide on how to choose watch size also explains how to measure the flat top of the wrist.
The wrist is the wrist, but conventions differ: women's watches are traditionally smaller, so we give a separate table. Plenty of women wear the men's ranges and vice versa; use whichever look you prefer.
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