Please examine this page on configuring the Standard buttons: http://www.telerik.com/help/aspnet-ajax/radsocialshare-standard-buttons.html
. There are several useful links in it on how exactly different properties affect them.
On the facebook buttons it is this one: http://developers.facebook.com/docs/reference/plugins/like/
. Note that the width of the ButtonCount type of button is at least 90px.
On twitter - it simply does not offer much customization options, only where the counter is placed (or if there shouldn't be a counter), so this is what we offer as well.
On GooglePlus - take a look at this page: https://developers.google.com/+/plugins/+1button/#button-sizes
. The Width property is not defined for it (its cell contains "-"). Their rendering for this button is not something we can control and is also subject to change on their end without notice.
All the best,
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed