Aside from the 38mm and 42mm sizes, there were initially many models of Apple Watch Series 3 and various bands. Today, Apple only sells the 2017 model in black and white variants with Sport Bands.

Apple Watch Series 5 vs. Series 3 ... according to Apple. The 42mm Series 3, by comparison, has a 740 square millimeter display while the 38mm version has a 563 square millimeter screen area.

Series 10 models weigh between 29.3 grams and 41.7 grams depending on size and material, with the titanium models coming in at about six grams heavier than aluminum models. The 42mm Apple Watch ...