The Apple Watch Series 7 models will come in 41mm and 45mm body sizes, up from the current 40mm and 44mm sizes. For the 45mm model, the screen will measure in at 1.9 inches diagonally, up from 1.78 inches, and it will have a resolution of 396 x 484, up from 368 x 448, which equates to 16 percent more pixels.