---
title: "StandardUSB::kDescriptorSize"
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 12.0+]
path: kernel/standardusb_tdescriptorsize/standardusb_kdescriptorsize
---

# StandardUSB::kDescriptorSize

## Declaration

```occ
StandardUSB::kDescriptorSize = kIOUSBDescriptorHeaderSize
```