Mark Gurman: Apple Watch 的 41 毫米、45 毫米等尺寸是指 Apple Watch 表壳的高度，而不是屏幕的高度。因此，更大的 Apple Watch 不会是 50 毫米，尽管有人这么称呼它。

原推：The Apple Watch sizes such as 41mm, 45mm etc refer to the height of the Apple Watch’s case, not the screen. Therefore the larger Apple Watch won’t be a 50mm, despite some calling it that.
https://twitter.com/markgurman/status/1544782052385587203