If your choice to meet the mobile challenge is to make your site or app elastic, this means you are laying out the content using the relative “em” unit of measurement. The “em” is a useful unit in CSS, since it enables HTML elements to adapt automatically to the font that the reader uses, thus optimizing it for use on phones and tablets.

All Telerik ASP.NET AJAX controls feature EM-based rendering, which means that they adapt to changes in the font size.