Is there a default size for Revmob Banner Ads? And if so, is it different than the size of iPhone banners?

I have an app that is on both iPhone and iPad, and was built with Unity and using the revmob Unity SDK. I am using the function ShowBanner() to display banner ads in the app, but the ads on iPad take up significantly more space on the UI than the iPhone ones. Is there a different default size for iPad ads that I should be using, and if so, how would I go about calling that if the player is on the iPad?

I am dying for an answer on this.