diff --git a/ios/Classes/FacebookAudienceNetworkBannerAd.swift b/ios/Classes/FacebookAudienceNetworkBannerAd.swift
index 5aee3b0..5ded09e 100644
--- a/ios/Classes/FacebookAudienceNetworkBannerAd.swift
+++ b/ios/Classes/FacebookAudienceNetworkBannerAd.swift
@@ -129,12 +129,18 @@ class FacebookAudienceNetworkBannerAdView: NSObject, FlutterPlatformView, FBAdVi
             ? true : false
         let valueId: String = existsId
             ? self.params["id"] as! String : ""
-        let width: CGFloat = (self.params["width"] != nil)
-            ? self.params["width"] as! CGFloat : 320.0
         let height: CGFloat = (self.params["height"] != nil)
             ? self.params["height"] as! CGFloat : 50.0
-        let adSize: FBAdSize = FBAdSize.init(size: CGSize.init(width: width, height: height))
-        
+		var adSize = kFBAdSizeHeight50Banner
+		if (height >= 250.0)
+		{
+			adSize = kFBAdSizeHeight250Rectangle
+		}
+		else if (height >= 90.0)
+		{
+			adSize = kFBAdSizeHeight90Banner
+		}
+		
         if (existsId) {
             self.bannerAd = FBAdView.init(placementID: valueId, adSize: adSize, rootViewController: UIApplication.shared.keyWindow?.rootViewController)
             self.bannerAd.delegate = self
diff --git a/lib/ad/ad_banner.dart b/lib/ad/ad_banner.dart
index 16200d5..0c59cdf 100644
--- a/lib/ad/ad_banner.dart
+++ b/lib/ad/ad_banner.dart
@@ -109,20 +109,15 @@ class _FacebookBannerAdState extends State<FacebookBannerAd>
       return Container(
         height: containerHeight,
         color: Colors.transparent,
-        child: Container(
-          width: widget.bannerSize.width.toDouble(),
-          child: Center(
-            child: UiKitView(
-              viewType: BANNER_AD_CHANNEL,
-              onPlatformViewCreated: _onBannerAdViewCreated,
-              creationParams: <String, dynamic>{
-                "id": widget.placementId,
-                "width": widget.bannerSize.width,
-                "height": widget.bannerSize.height,
-              },
-              creationParamsCodec: StandardMessageCodec(),
-            ),
-          ),
+        child: UiKitView(
+          viewType: BANNER_AD_CHANNEL,
+          onPlatformViewCreated: _onBannerAdViewCreated,
+          creationParams: <String, dynamic>{
+            "id": widget.placementId,
+            "width": widget.bannerSize.width,
+            "height": widget.bannerSize.height,
+          },
+          creationParamsCodec: StandardMessageCodec(),
         ),
       );
     } else {