---
title: UIUserInterfaceSizeClass
framework: uikit
role: symbol
role_heading: Enumeration
path: uikit/uiuserinterfacesizeclass
---

# UIUserInterfaceSizeClass

Constants that indicate the size class of a view.

## Declaration

```swift
enum UIUserInterfaceSizeClass
```

## Topics

### Constants

- [UIUserInterfaceSizeClass.unspecified](uikit/uiuserinterfacesizeclass/unspecified.md)
- [UIUserInterfaceSizeClass.compact](uikit/uiuserinterfacesizeclass/compact.md)
- [UIUserInterfaceSizeClass.regular](uikit/uiuserinterfacesizeclass/regular.md)

### Initializers

- [init(_:)](uikit/uiuserinterfacesizeclass/init(_:).md)
- [init(rawValue:)](uikit/uiuserinterfacesizeclass/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Retrieving size class traits

- [horizontalSizeClass](uikit/uitraitcollection/horizontalsizeclass.md)
- [verticalSizeClass](uikit/uitraitcollection/verticalsizeclass.md)