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

# Size

A 32-bit integer that specifies the number of bytes in this track input atom.

## See Also

### Data fields

- [Type](quicktime-file-format/track_input_atom/type.md)
- [Atom ID](quicktime-file-format/track_input_atom/atom_id.md)
- [Reserved](quicktime-file-format/track_input_atom/reserved.md)
- [Child count](quicktime-file-format/track_input_atom/child_count.md)
- [Reserved](quicktime-file-format/track_input_atom/reserved_2.md)
- [Input type atom](quicktime-file-format/track_input_atom/input_type_atom.md)
- [Object ID atom](quicktime-file-format/track_input_atom/object_id_atom.md)