# overhead

> The size of the header section of the referenced file.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Build.Reporting](/engine/6000.3/script-reference/unityeditor/build/reporting.md)
* **Assembly:** UnityEditor

```csharp
public ulong overhead { get; }
```

### Remarks

Some file formats have no header, in which case this returns zero.