---
title: kIOUSBDescriptorHeaderSize
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 13.0+, macOS 10.15+]
path: iokit/tiousbdescriptorsize/kiousbdescriptorheadersize
---

# kIOUSBDescriptorHeaderSize

## Declaration

```occ
kIOUSBDescriptorHeaderSize = 2
```