The Apple Watch 4 brings some significant upgrades over the Series 3. For one, we have a slimmer casing, slightly bigger screen size and improved pixel count, offering much better screen visibility.

The only problem with the Apple ... 42mm case sizes. This is different from the Series 7, Series 8, and Series 9, which give users a choice of a 41mm or 45mm case. For the Series 4-6, case ...