A simple way to get screen size and rounded corner size of Apple Watch.


Require watchOS 4 or higher. In Xcode go to File -> Swift Packages -> Add Package Dependency and paste in the repo’s url:

Or you can download the code of this repo, then Add Local... in Xcode, and open the folder of the repo.


  • Import this package after you installed by import AppleWatchScreenSize
  • This repo define a public struct called ScreenSize containing 3 vars called width, height and a computed var cornerSize. You can easily know what they mean from their name(Note all vars were measured as px). So the demo code would be like:

import SwiftUI
import AppleWatchScreenSize

struct ContentView: View {
    let screenSize = ScreenSize()
    var body: some View {
        RoundedRectangle(cornerSize: CGSize(width: Double(screenSize.cornerSize ?? 0), height: Double(screenSize.cornerSize ?? 0)))
            .stroke(lineWidth: 10.0)

The preview will be like:


How does it work

The data comes from Since Apple Watch with same resolution share the same rounded corner size, it’s not hard to refer the corner size from given screen size. Before series 3 Apple Watch just have a rectangle screen, so the corner size of them will return nil instead.

It can’t be denied that Apple may someday release a new watch with same resolution but different corner size, but it works fine by now 😉


View Github