Casio F-91W

Its lugs add only 3 mm to the 35.2 mm case, against 7.1 mm typical across the almanac, so it wears smaller than its diameter suggests.

On our fit model it sits best on wrists from 5.5" to 6.25" (14.0–15.9 cm).

At 8.5 mm thick it is slimmer than 90% of the 10 other digital watches we've measured, so it slides under a cuff more easily than most.