5.8 inches for the iPhone XS, 6.1 inches for the iPhone XR, and 6.5 inches for the iPhone XS Max. The XR gets a special designation because its screen is LCD (like the iPhone 8) rather than OLED ...
The iPhone 7 started at $649, but now the iPhone XR starts at $749, the iPhone XS starts at $999, and the iPhone XS Max starts at $1,099. And that's just in the US; prices get even more expensive ...
The phone launched alongside the iPhone XS, its smaller but otherwise identical sibling. The following month, Apple released the cheaper iPhone XR, which had the same A12 chip but a lesser display ...