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# NSCollectionLayoutSize

The width and the height of an item in a collection view.

```
@MainActor class NSCollectionLayoutSize
```

## Overview

A size is a pair of dimensions ([`NSCollectionLayoutDimension`](/documentation/UIKit/NSCollectionLayoutDimension)): a width dimension and a height dimension. Every component of a collection view layout has an explicit size.

## Topics

### Creating a layout size

[`init(widthDimension:heightDimension:)`](/documentation/UIKit/NSCollectionLayoutSize/init(widthDimension:heightDimension:))

Creates a size with the specified width and height dimensions.

### Getting the width and height

[`widthDimension`](/documentation/UIKit/NSCollectionLayoutSize/widthDimension)

The width dimension of an item in a collection view layout.

[`heightDimension`](/documentation/UIKit/NSCollectionLayoutSize/heightDimension)

The height dimension of an item in a collection view layout.


---

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