---
title: IOPhysSize
framework: IOKit
role: symbol
role_heading: Global Variable
platforms: [iOS 16.0+, iPadOS 16.0+, Mac Catalyst 13.0+, macOS 10.0+, visionOS 1.0+]
path: iokit/iophyssize
---

# IOPhysSize

## Declaration

```swift
var IOPhysSize: Int32 { get }
```