Digital Point Ads supports responsive ad sizes now by adding CSS to your site to call out the ad sizes you want a certain ad to be. All ads are assigned an ID based on their placement on the page. The first ad will have an ID of "dp_ad_1", second one will be "dp_ad_2", etc. As an example, say you had 2 ads running on the page, with one defaulting to 728x90 and the other to 120x600. If you added the following CSS to your site/page, the ads would serve up smaller versions depending on the window size: <style> @media(min-width: 500px) { ins#dp_ad_1 { width: 234px; height: 60px; } ins#dp_ad_2 { width: 125px; height: 125px; } } @media(min-width: 800px) { ins#dp_ad_1 { width: 468px; height: 60px; } ins#dp_ad_2 { width: 120px; height: 240px; } } </style> Code (css): The changes require you to update your ad serving code here: https://advertising.digitalpoint.com/publisher?action=formats If you are using AdSense ads as your fallback when no ads are available, you will want to create new responsive ad units on your AdSense account to utilize (the responsive system fully supports responsive AdSense ad units).