As you're
link all keenly aware sizing is the sum of more than just one dimension and the Deepstar 39mm Chronograph measures 16.5mm thick and
link 48.5mm lug-to-lug. If we compare the 39mm version against the 40.5mm version from 2020 the thickness is the same inclusive of the domed
link sapphire crystal but the lug-to-lug has dropped by 1.5mm balancing nicely with the decreased case width.