Google Adsense had recently introduced options for selecting fonts for publishers, although the available fonts were limited. Now Adsense has another feature where publishers can resize the font that appears on their website serving Adsense ads. You can now choose from small, medium and large font sizes ad blocks on pages in roman character languages. These settings are provided from the Ad Display Preference section in the My Account tab of your AdSense account. This is what Google Adsense team says: The font you choose will be applied to the body of the ad with the title scaled appropriately. To fit in the ad text correctly, the actual size varies for each size, font, and user-specific settings, such as browsers and operating systems. In addition, some formats sizes currently very limited space, so the font application is most evident in cases where the number of ads in your ad units varies automatically to your performance to maximize. Apart from this the default font will be changed from small to medium if performance increase with the increase in volume and by the Adsense team. So in case you want to stick with the current font, your font as’ small ‘in your account.