---
title: IOPhysicalLength
framework: IOKit
role: symbol
role_heading: Type Alias
platforms: [iOS 18.4+, iPadOS 18.4+, Mac Catalyst 13.0+, macOS 10.0+, visionOS 2.4+]
path: iokit/iophysicallength
---

# IOPhysicalLength

## Declaration

```swift
typealias IOPhysicalLength = IOPhysicalLength64
```