As you're all keenly aware, sizing is the sum of more than just one dimension, and https://is.gd/1PgBtF link the Deepstar 39mm Chronograph measures 16.5mm thick and 48.5mm lug-to-lug. If we compare the https://is.gd/6ooyvA link 39mm version against the 40.5mm version from 2020, the thickness is the same (inclusive of the domed sapphire crystal) but the lug-to-lug https://v.gd/lzSJSb link has dropped by 1.5mm, balancing nicely with the decreased case width.

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