Watch size chart for your wrist

Updated 28 October 2026 · computed from the published fit model

On a 15 cm (5.9 in) wrist, a round watch up to about 36mm wears as an everyday size and the lugs pass the edge of the wrist from about 42mm. On a 17 cm (6.7 in) wrist those numbers are 41mm and 48mm; on 19 cm (7.5 in), 45mm and 53mm. The full chart is below.

What decides fit is not the case diameter but the span from lug tip to lug tip, compared with the flat width across the top of your wrist. The chart turns that into case sizes for a typical round watch, whose lug-to-lug runs about 1.15 times its diameter. If a watch's own lug-to-lug is published, use the right-hand columns instead — or open its page here, which uses the real figure.

The chart

Round case diameters, then the same bands as lug-to-lug spans. Balanced = everyday fit with skin either side; sweet spot = fills the wrist; max = lugs at the edge.
Wrist round	Flat width	Balanced case	Sweet-spot case	Max case	Lug-to-lug: balanced / sweet / max
13.5 cm / 5.3 in	43.5mm	27–32mm	32–36mm	38mm	30–37 / 37–41 / 44mm
14 cm / 5.5 in	45.2mm	27–33mm	33–37mm	39mm	32–38 / 38–43 / 45mm
14.5 cm / 5.7 in	46.8mm	28–35mm	35–39mm	41mm	33–40 / 40–44 / 47mm
15 cm / 5.9 in	48.4mm	29–36mm	36–40mm	42mm	34–41 / 41–46 / 48mm
15.5 cm / 6.1 in	50mm	30–37mm	37–41mm	43mm	35–43 / 43–48 / 50mm
16 cm / 6.3 in	51.6mm	31–38mm	38–43mm	45mm	36–44 / 44–49 / 52mm
16.5 cm / 6.5 in	53.2mm	32–39mm	39–44mm	46mm	37–45 / 45–51 / 53mm
17 cm / 6.7 in	54.8mm	33–41mm	41–45mm	48mm	38–47 / 47–52 / 55mm
17.5 cm / 6.9 in	56.5mm	34–42mm	42–47mm	49mm	40–48 / 48–54 / 56mm
18 cm / 7.1 in	58.1mm	35–43mm	43–48mm	50mm	41–49 / 49–55 / 58mm
18.5 cm / 7.3 in	59.7mm	36–44mm	44–49mm	52mm	42–51 / 51–57 / 60mm
19 cm / 7.5 in	61.3mm	37–45mm	45–51mm	53mm	43–52 / 52–58 / 61mm
19.5 cm / 7.7 in	62.9mm	38–46mm	46–52mm	55mm	44–53 / 53–60 / 63mm
20 cm / 7.9 in	64.5mm	39–48mm	48–53mm	56mm	45–55 / 55–61 / 65mm
20.5 cm / 8.1 in	66.1mm	40–49mm	49–55mm	58mm	46–56 / 56–63 / 66mm
21 cm / 8.3 in	67.7mm	41–50mm	50–56mm	59mm	47–58 / 58–64 / 68mm

Linked wrist sizes open a page of real watches that fit that wrist, ranked by how close they sit to the middle of the sweet spot.

Reading it

Balanced is where most people end up for a watch they wear all day: the lugs stop a few millimetres short of the edges and you see skin either side. Sweet spot is the deliberate sports-watch look — the case fills the top of the wrist without hanging over. Past max the lugs sit beyond the edge; the strap then bends away from the wrist and the watch rocks.

Square and rectangular watches (Apple Watch, Amazfit Bip, Redmi Watch) take their strap at the ends of the case, so their case length is their lug-to-lug: read the right-hand column. A 46mm Apple Watch is 46mm long, which wears like a round watch of about 40mm.

Thickness does not move these bands but changes how a watch feels within them: a 15mm case at the top of a band sits higher and catches cuffs more than a 10mm one.

The bands come from the ratios on the methodology page. Circumference is converted at 3.1 × wrist breadth, the ratio in the US Army anthropometric survey (USAARL 88-5: 5.7 cm breadth for a 17.7 cm wrist), and breadth stands in for the flat top the lugs rest on. The 1.15 lug-to-lug ratio is the one the site uses wherever a maker publishes no lug-to-lug. A tape round your own wrist beats any conversion — how to measure it.

Check one watch

Every watch page has the same table for that model — with its published lug-to-lug where the maker gives one — and a tool that draws it on your wrist at true scale. Browse watches or compare two.