@Kale Thank you! This worked perfectly.
I'm not sure what the '#hero' is? I'm not too familiar with CSS but I've made minor edits to pages with collection ID's.
Also, why wouldn't { height: } work? What's the 'min-height' offer?
@Kale CleoThreads.com. I can edit the universal banner size via the Style Editor, however I'm trying to make an exception with one particular 'collection' or page so its banner height is significantly smaller.