How to Create Custom Ad Sizes in Adsense

1. Open your Internet browser and go to the Adsense page. Enter your Google username and password in the login fields and click 'Sign In' to access your account.
2. Click on the 'My Ads' tab at the top of your Adsense account page. Click the'New Ad Unit' button in the top left of the 'My Ads' section.

3. Enter the new ad's name in the first text field. Click on the drop-down menu labeled 'Size' to view the custom size dimensions. To view examples of the custom ad sizes, click the 'View examples of ad types and sizes' link below the drop-down menu. Click on the custom ad size that you want to use to select it.
4. Finish setting up the custom sized ad by using the following drop-down menus to select your prefered ad type and ad color styles. Click 'Save and Get Code' to save the add and obtain the embed code to add it to your site.