# resize(byWidth:height:duration:) Creates an action that adjusts the size of a sprite. ``` class func resize(byWidth width: CGFloat, height: CGFloat, duration: TimeInterval) -> SKAction ``` ## Parameters `width` The amount to add to the sprite’s width. `height` The amount to add to the sprite’s height. `duration` The duration of the animation. ## Return Value A new action object. ## Discussion This action can only be executed by a [`SKSpriteNode`](/documentation/SpriteKit/SKSpriteNode) object. When the action executes, the sprite’s [`size`](/documentation/SpriteKit/SKSpriteNode/size) property animates to its new value. This action is reversible; the reverse is created as if the following code is executed: ```swift let action = SKAction.resize(byWidth: -width, height: -height, duration: sec) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)