---
title: Size
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/sample_group_description_atom/size
---

# Size

A 32-bit integer that specifies the number of bytes in this sample group description atom.

## Mentioned in

Representing encoder delay explicitly

## See Also

### Data fields

- [Type](quicktime-file-format/sample_group_description_atom/type.md)
- [Version](quicktime-file-format/sample_group_description_atom/version.md)
- [Flags](quicktime-file-format/sample_group_description_atom/flags.md)
- [Grouping type](quicktime-file-format/sample_group_description_atom/grouping_type.md)
- [Default length](quicktime-file-format/sample_group_description_atom/default_length.md)
- [Entry count](quicktime-file-format/sample_group_description_atom/entry_count.md)
- [Payload data](quicktime-file-format/sample_group_description_atom/payload_data.md)