At HillTopAds we're working with the following banner sizes:
Desktop: 300x250,160x600, 728x90.
Mobile: 300x250, 300x100, 300x50.
In order to get codes please enter into the “Manage Site and Zones” directory, choose the website where you'd like to add banners and click the “add zone” button.
After that, you will see the new window, where you should choose a zone name, zone type (banners) and banner size:
When it's all done, please click on“Add zone” button, and get your banner ad code: