The measurements and design of the series 5 are almost completely unchanged from the apple watch series 4 it looks exactly the same and comes in the same two sizes with the same display size.
Apple watch series 4 vs 5 size comparison.
Apple watch series 1 is splash and water resistant but submerging it is not recommended.
Apple watch series 1 has a water resistance rating of ipx7 under iec standard 60529.
The most compelling reason to upgrade to apple watch series 5 is the always on display.
But if you have a series 4 the differences between the two don t justify an upgrade for most people.
Apple watch series 5 is a great smartwatch thanks in part to its always on display.
If you want the absolute newest look this year the titanium model wins the day.
Apple doesn t usually make massive changes from one apple watch to the next and this year is no different.