---
title: Size
framework: QuickTime File Format
role: symbol
role_heading: Data field
path: quicktime-file-format/movie_data_atom/size
---

# Size

A 32-bit integer that specifies the number of bytes in this media data atom.

## Overview

Overview If the atom exceeds 2^32 byte, set the size field to 1.

## See Also

### Data fields

- [Type](quicktime-file-format/movie_data_atom/type.md)
- [Extended size](quicktime-file-format/movie_data_atom/extended_size.md)
- [Movie media data](quicktime-file-format/movie_data_atom/movie_media_data.md)