diff --git a/src/dom/replaced-elements/iframe-element-container.ts b/src/dom/replaced-elements/iframe-element-container.ts
index 1ad8d85..3482976 100644
--- a/src/dom/replaced-elements/iframe-element-container.ts
+++ b/src/dom/replaced-elements/iframe-element-container.ts
@@ -13,8 +13,8 @@ export class IFrameElementContainer extends ElementContainer {
     constructor(context: Context, iframe: HTMLIFrameElement) {
         super(context, iframe);
         this.src = iframe.src;
-        this.width = parseInt(iframe.width, 10) || 0;
-        this.height = parseInt(iframe.height, 10) || 0;
+        this.width = parseInt(iframe.width, 10) || iframe.offsetWidth || 0;
+        this.height = parseInt(iframe.height, 10) || iframe.offsetHeight || 0;
         this.backgroundColor = this.styles.backgroundColor;
         try {
             if (