The return of the small watch, and what it means for your wrist
Founder & CEO, Smartlet - CentraleSupelec engineer - Concours Lepine 2025, Awarded - CES 2026
Contents
For fifteen years the wristwatch inflated. Forty-two millimetres became normal, forty-four unremarkable, and anything under forty felt like a compromise. That era is ending, and the interesting part for anyone wearing two things on one wrist is not the diameter on the spec sheet. It is a smaller number, one almost nobody checks, that quietly decides whether a shrinking watch can carry a sensor at all.
- The shift. Case sizes are moving back toward 36 to 39mm across every tier, from Rolex to microbrands, over the last few years.
- The context. This is a return, not a revolution: 36mm was the standard for most of the twentieth century.
- The real number. Diameter is the headline; lug width and lug-to-lug decide fit, on the wrist and for a pin.
- The sweet spot. Most 36 to 38mm watches carry 18 to 20mm lugs, squarely in the Smartlet range.
- The edge. Go below 36mm and lugs can drop to 16mm, out of range, so smaller is not always better for dual-wear.
Smaller is not new, it is a return
The evidence is broad and it is not a microbrand fad. Rolex makes the Oyster Perpetual in 34 and 36 again, the Tudor Black Bay 58 dropped from 41 to 39 because customers asked, Blancpain released a 38.2 millimetre Fifty Fathoms in 2025 down from 45, A. Lange shrank the Saxonia Annual Calendar to 36, and microbrands launch almost everything under 38. When the brands that actually make the watches downsize, that is a market, not a trend.
It helps to remember this is a homecoming. The original 1945 Datejust was 36 millimetres; the Explorer stayed 36 until 1989. Smaller was the standard for most of the twentieth century, and the oversized run from roughly 2005 to 2020 was the outlier. So the honest framing is restraint returning, not a new invention.
In fairness, the swing is not absolute. The pace of downsizing slowed in 2025, some flagships keep growing, and a few observers expect sizes to creep back up. Call it a strong, uneven correction rather than a law.
The number that actually decides fit
Here is the part the size debate usually misses. Diameter is the headline; it tells you roughly how much dial you are looking at. It does not tell you how the watch sits, and it does not tell you whether it can take a pin. Two other numbers do that work. Lug-to-lug, the tip-to-tip length, decides overhang and how large the watch truly wears. Lug width, the gap between the lugs, decides what can attach.
A 40mm watch with a 52mm lug-to-lug swallows a small wrist; a 45mm diver with short curved lugs can wear smaller than its diameter suggests. And for dual-wear, the deciding figure is lug width: only an 18 to 24mm lug takes a Smartlet pin, whatever the case diameter says. The whole logic sits in the complete lug width guide and the lug hole and the pin.
The good news is that the small-watch return mostly lands in the right place. A 36 to 38 millimetre watch typically carries an 18, 19 or 20 millimetre lug, which is the pin's sweet spot. The sizes collectors are rediscovering are, by and large, the sizes that dual-wear best.
Where it helps, and where it stops
A smaller watch is genuinely better company for a sensor. Less diameter and less weight up top mean the stacked pair sits lighter and neater on the wrist, the same argument that makes a lightweight titanium piece such a good base, as in the Grand Seiko Snowflake pairing. It ties to why collectors keep the watch and add a sensor and treat two wearables as a quiet rebellion. If you are moving to a 36 to 38 millimetre watch, you are probably making your dual-wear setup more comfortable, not less, an extension of the imprecision premium mindset.
There is a floor. Push below 36mm into true vintage-sized 32 to 34mm territory and the lug width often drops to 16mm or less, which falls outside the 18 to 24mm range. Very small watches can be too small to dual-wear. Check the lug width, not the diameter, before you assume a tiny watch qualifies.
So the trend and the architecture agree, up to a point. The move to 36 to 38 millimetres brings watches back into the range that pairs cleanest; going smaller than that trades dual-wear away for pure vintage proportion. It is the same instinct behind composing a setup deliberately rather than by mood. Check the brand compatibility index and the collection for the specifics.
