Seamaster Diver 300M 43.5 Black Ceramic

Its lugs add 8 mm to the 43.5 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 7.25" to 8.5" (18.4–21.6 cm); below 7.25" the lugs start to reach the edge of the wrist.

At 14.5 mm thick it is thicker than 87% of the 124 other dive watches we've measured, so expect it to sit tall on the wrist.

Its 21 mm lug width is one of the most common strap sizes; 34 other watches here share it, so aftermarket straps are easy to find.