---
title: bLength
framework: usbdriverkit
role: symbol
role_heading: Instance Property
path: usbdriverkit/iousbendpointdescriptor/blength
---

# bLength

The length of the descriptor in bytes.

## Declaration

```occ
uint8_t bLength;
```

## See Also

### Accessing the Descriptor Properties

- [bDescriptorType](usbdriverkit/iousbendpointdescriptor/bdescriptortype.md)
- [bEndpointAddress](usbdriverkit/iousbendpointdescriptor/bendpointaddress.md)
- [bmAttributes](usbdriverkit/iousbendpointdescriptor/bmattributes.md)
- [wMaxPacketSize](usbdriverkit/iousbendpointdescriptor/wmaxpacketsize.md)
- [bInterval](usbdriverkit/iousbendpointdescriptor/binterval.md)