[Video](https://www.youtube.com/watch?v=h-FMndW2kHo) Google Mobile Ads SDK supports fixed ad sizes for situations where adaptive banners ads don't meet your needs. The following table lists the standard banner sizes. | Size in dp (WxH) | Description | Availability | AdSize constant | |---|---|---|---| | 320x50 | Banner | Phones and tablets | `GADAdSizeBanner` | | 320x100 | Large banner | Phones and tablets | `GADAdSizeLargeBanner` | | 300x250 | IAB medium rectangle | Phones and tablets | `GADAdSizeMediumRectangle` | | 468x60 | IAB full-size banner | Tablets | `GADAdSizeFullBanner` | | 728x90 | IAB leaderboard | Tablets | `GADAdSizeLeaderboard` | To define a custom banner size, set your size using [`GADAdSizeFromCGSize`](https://developers.google.com/admob/ios/api/reference/Functions.md.txt): ### Swift ```swift let adSize = adSizeFor(cgSize: CGSize(width: 250, height: 250)) ``` ### Objective-C ```objective-c GADAdSize size = GADAdSizeFromCGSize(CGSizeMake(250, 250)); ``` Set an ad size smaller than or equal to the device screen size. To determine the maximum screen size on iOS 26 and later, use the [`UIWindowScene.effectiveGeometry.coordinateSpace`](https://developer.apple.com/documentation/uikit/uiwindowscene/geometry/coordinatespace) property. On iOS 18 and earlier, use the [`UIWindowScene.coordinateSpace`](https://developer.apple.com/documentation/uikit/uiwindowscene/coordinatespace) property. For details about size constraints, see [Ad request size requirements](https://support.google.com/admob/answer/9905175#ad-request-size-requirement). ## Fixed size banner ads example [Swift](https://github.com/googleads/googleads-mobile-ios-examples/blob/main/Swift/advanced/APIDemo/APIDemo/AdMobBannerSizesViewController.swift) [Objective-C](https://github.com/googleads/googleads-mobile-ios-examples/blob/main/Objective-C/advanced/APIDemo/APIDemo/AdMobBannerSizesViewController.m)