---
title: maximumSize
framework: quicklookthumbnailing
role: symbol
role_heading: Instance Property
path: quicklookthumbnailing/qlfilethumbnailrequest/maximumsize
---

# maximumSize

The maximum accepted size of a thumbnail.

## Declaration

```swift
var maximumSize: CGSize { get }
```

## Discussion

Discussion The maximumSize accepted is also the preferred size of the thumbnail that you need to create. Your generated thumbnail’s width or height should match the width or height of the maximumSize, or, ideally, both.

## See Also

### Describing the Requested Thumbnail

- [minimumSize](quicklookthumbnailing/qlfilethumbnailrequest/minimumsize.md)
- [scale](quicklookthumbnailing/qlfilethumbnailrequest/scale.md)
- [fileURL](quicklookthumbnailing/qlfilethumbnailrequest/fileurl.md)