Question: what size are apple watch 3?
Answer: Both watches come in two sizes: the Apple Watch Series 4 in 40 mm and 44 mm, and the Apple Watch Series 3 in 38 mm and 42 mm. The upside of the larger case, however, is a larger screen: Apple Watch Series 3, 38 mm — 563 sq mm display area. Apple Watch Series 3, 42 mm — 740 sq mm display area.