---
title: bLength
framework: kernel
role: symbol
role_heading: Instance Property
path: kernel/iousbbosdescriptor/1545985-blength
---

# bLength

The size of the descriptor.

## Declaration

```occ
uint8_t bLength;
```

## See Also

### Getting the Properties

- [bDescriptorType](kernel/iousbbosdescriptor/1546245-bdescriptortype.md)
- [wTotalLength](kernel/iousbbosdescriptor/1546141-wtotallength.md)
- [bNumDeviceCaps](kernel/iousbbosdescriptor/1546040-bnumdevicecaps.md)