Hi,
If you just want to get the WebView's size, you would get it through it's container since the WebView requires a parent window and it always completely fills its parent window. If you use one of the wrapper class we provide (for example, EO.WinForm.WebControl), then you just use the Size property of the wrapper control.
If you want to get the size of the page inside the WebView, you can use this method:
https://www.essentialobjects.com/doc/eo.webbrowser.webview.getpagesize.aspxThanks!