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

# Size

A 32-bit unsigned integer that indicates the size in bytes of the atom structure.

## See Also

### Data fields

- [Type](quicktime-file-format/metadata_key_atom/type.md)
- [Variable array of atoms](quicktime-file-format/metadata_key_atom/variable_array_of_atoms.md)