Case diameter

27 mm watches

On the small side by modern standards; sizes like this were the norm for mid-century watches. Lug-to-lug length and case thickness matter as much as diameter for how a watch fits.

Watchfari lists 256 references with a sourced case diameter of 27.0 to 27.99 mm, spread across 16 brands and 40 families. Sourced case diameters run from 27 mm to 27.8 mm. By movement type: 102 quartz, 18 automatic, and 13 solar. The most common sourced case material is stainless steel (52 of 121).