Methodology
Every fit verdict on this site comes from one formula applied to manufacturer specifications. Both are written out below, so you can check the reasoning rather than take the answer on trust.
How fit is calculated
The model compares one number against one number: the watch's footprint from lug tip to lug tip, and the flat width of your wrist measured bone to bone. Dividing the first by the second gives a ratio, and the ratio decides the verdict.
Case diameter is deliberately not the input. A watch overhangs when its lugs pass the edge of the wrist, and lug span can differ by several millimetres between two watches sharing an identical bezel size — which is exactly why shopping by case diameter produces watches that measured right and wore wrong.
A ratio above 1.0 means the lugs sit past the edge of the wrist. Between 0.7 and 0.95 the watch fills the wrist without spilling over — the band conventional sizing advice describes as a deliberate fit. Below that it reads as understated, which is a preference rather than a mistake.
| Verdict | Lug-to-lug ÷ wrist width |
|---|---|
| Understated | below 0.7 |
| Balanced | 0.7 – 0.85 |
| Sweet spot | 0.85 – 0.95 |
| Bold | 0.95 – 1.0 |
| Lugs overhang | above 1.0 |
Clearance figures shown next to a verdict are per side: half the difference between your wrist width and the watch's footprint.
Where a page quotes wrist circumference rather than width, the conversion is circumference = 3.1 × flat width. That is the ratio measured on real wrists (US Army anthropometry: a 5.7 cm bone-to-bone wrist is 17.7 cm round, and the ratio holds from small to large). Until 28 October 2026 the site used π × 0.85, the perimeter of an ellipse, which made every circumference read about 15% wider than it is; answers given for a flat width were not affected. A ruler across your own wrist is still better than the conversion.
How the data is handled
Specifications come from the maker
Dimensions are taken from manufacturer specification sheets and established watch reference databases — never from retailer listings, marketplace copy or crowd-sourced entries, which drift from the real figures and from each other.
Gaps stay gaps — with one labelled exception
Where a manufacturer does not publish a measurement, the field stays empty and renders as a dash. The exception is lug-to-lug on round watches: many makers publish a round case as "45 × 45 mm", which is the diameter twice, not the span between the lug tips. Fit cannot be judged without that span, so the model uses 1.15 × the case width, rounded to half a millimetre, and every page that relies on it says the figure is an estimate. A measured span always replaces it.
One rule, applied identically
Every watch is judged by the same formula below. There is no editorial thumb on the scale for particular brands, and no ranking is influenced by whether a model carries an affiliate link.
Corrections are cheap and welcome
If a figure here disagrees with the manufacturer, the manufacturer is right. Reports are acted on directly against the database rather than queued behind an editorial cycle.
How the battery rankings work
Every battery figure on the site is the maker's own claim, as held in our catalogue — not a test we ran. Makers measure each mode under their own usage profile, so the rankings compare within one mode at a time and never add modes together. “Everyday” is the smartwatch or typical-use figure; GPS is continuous tracking; power-saving is the maker's low-power mode.
Garmin's own spec sheets are used for Garmin watches, with an explicit “GPS Only” line preferred over Max Battery GPS. A time-only “watch mode” figure is not counted as everyday use. Editions of one watch with identical figures — sapphire, titanium, LTE, Wi-Fi — share one row, and sub-brands are ranked with their parent (Redmi and Poco with Xiaomi, Zepp with Amazfit, NoiseFit with Noise). Hybrid watches with hands and no touchscreen are listed apart, because they are quoted in months.
A GPS figure that is not lower than the same watch's everyday figure, or above five days without solar charging, is held back for review rather than ranked. Every watch gets its own place: when the ranked figure is equal, the watch with longer figures in the other battery modes ranks higher, then the newer release, then the name alphabetically.
A brand has its own ranking page once we hold six or more rated models for it; the sentences on those pages are computed from our data and say what our catalogue shows, not what a maker publishes. A watch page is offered to search engines when we hold its case width, weight, image, a runtime and a release date from 2020 on.
Corrections and independence
Spotted a figure that disagrees with the manufacturer, or a watch that should be here? Write to [email protected] with the model and the correct value. Affiliate links appear on some pages and never influence a measurement, a ranking or a fit verdict — see the affiliate disclosure. The interactive sizing guides live on the home page, and the watch size chart applies this formula to every wrist from 14 to 20 cm.