---
title: tIOUSBDescriptorSize
framework: usbdriverkit
role: symbol
role_heading: Enumeration
path: usbdriverkit/tiousbdescriptorsize
---

# tIOUSBDescriptorSize

Constants for the number of bytes in descriptor structures.

## Declaration

```occ
enum tIOUSBDescriptorSize : unsigned int;
```

## Topics

### Getting the Descriptor Size

- [kIOUSBDescriptorHeaderSize](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorheadersize.md)
- [kIOUSBDescriptorSizeDevice](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizedevice.md)
- [kIOUSBDescriptorSizeConfiguration](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeconfiguration.md)
- [kIOUSBDescriptorSizeInterface](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeinterface.md)
- [kIOUSBDescriptorSizeEndpoint](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeendpoint.md)
- [kIOUSBDescriptorSizeStringMinimum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizestringminimum.md)
- [kIOUSBDescriptorSizeStringMaximum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizestringmaximum.md)
- [kIOUSBDescriptorSizeDeviceQualifier](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizedevicequalifier.md)
- [kIOUSBDescriptorSizeInterfaceAssociation](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeinterfaceassociation.md)
- [kIOUSBDescriptorSizeBOS](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizebos.md)
- [kIOUSBDescriptorSizeDeviceCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizedevicecapability.md)
- [kIOUSBDescriptorSizeUSB20ExtensionCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeusb20extensioncapability.md)
- [kIOUSBDescriptorSizeSuperSpeedUSBDeviceCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizesuperspeedusbdevicecapability.md)
- [kIOUSBDescriptorSizeContainerIDCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizecontaineridcapability.md)
- [kIOUSBDescriptorSizeHubMinimum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizehubminimum.md)
- [kIOUSBDescriptorSizeHubMaximum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizehubmaximum.md)
- [kIOUSBDescriptorSizeSuperSpeedHub](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizesuperspeedhub.md)
- [kIOUSBDescriptorSizeSuperSpeedUSBEndpointCompanion](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizesuperspeedusbendpointcompanion.md)
- [kIOUSBDescriptorSizeSuperSpeedPlusIsochronousEndpointCompanion](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizesuperspeedplusisochronousendpointcompanion.md)
- [kIOUSBDescriptorSizeBillboardDeviceMinimum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizebillboarddeviceminimum.md)
- [kIOUSBDescriptorSizeBillboardDeviceMaximum](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizebillboarddevicemaximum.md)
- [kIOUSBDescriptorSizePlatformECIDCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeplatformecidcapability.md)
- [kIOUSBDescriptorSizePlatformCapability](usbdriverkit/tiousbdescriptorsize/kiousbdescriptorsizeplatformcapability.md)

## See Also

### Descriptor Fundamentals

- [IOUSBDescriptorHeader](usbdriverkit/iousbdescriptorheader.md)
- [IOUSBDescriptor](usbdriverkit/iousbdescriptor.md)
- [tIOUSBDescriptorType](usbdriverkit/tiousbdescriptortype.md)
- [Descriptor Utilities](usbdriverkit/descriptor-utilities.md)