iOS default font sizes - also available on https://www.iosfontsizes.com

ios-font-sizes.swift

let styles: [UIFont.TextStyle] = [
    // iOS 11
    .largeTitle,
    // iOS 9
    .title1, .title2, .title3, .callout,
    // iOS 7
    .headline, .subheadline, .body, .footnote, .caption1, .caption2,
]

for style in styles {
    let font = UIFont.preferredFont(forTextStyle: style)
    print("\(style): \(font.fontName) @ \(font.pointSize)")
}

results.markdown

Style	Font	Size
.largeTitle	SFUI-Regular	34.0
.title1	SFUI-Regular	28.0
.title2	SFUI-Regular	22.0
.title3	SFUI-Regular	20.0
.headline	SFUI-Semibold	17.0
.callout	SFUI-Regular	16.0
.subheadline	SFUI-Regular	15.0
.body	SFUI-Regular	17.0
.footnote	SFUI-Regular	13.0
.caption1	SFUI-Regular	12.0
.caption2	SFUI-Regular	11.0

Thanks 👍
This is useful documentation :)

Thank you!
I am guessing these results are from running the code with the default user font preferences?

@NikolaKirev Correct, this is just at the default dynamic type size. You can see a graph of what happens to the type sizes in this graph.

what are the font sizes for iPad?

I think when considering accessibilities this won't be the correct size anymore.

Useful... Thanks

Usefu! Thanks!

is WatchOS different? On WatchOS .footnote seems to be smaller than .caption and .caption2 🤔 https://developer.apple.com/design/human-interface-guidelines/watchos/visual/typography/

Thank you for posting this.

Thank you @gesabo for the link. Here is those values for iOS https://developer.apple.com/design/human-interface-guidelines/ios/visual-design/typography#dynamic-type-sizes

This is very useful!