Hi guys, I'm using the "GAMMA" theme and I like to take advantage of the available banner space. There are about 8 spaces with different sizes. Could someone give me the sizes of each banner space? the first "home top banner" can be used up to "970x250PX" and can be responsive. I'd like to know the optimized size for all the rest. Any help?

Well you should focus on responsive banners, not setting absolute size.
Anyway you can get it simply via inspect tools of your browser.