Padding around image/icon

I am new to squarespace but have made websites on several other platforms. One thing I find frustrating is the lack of control over simple things like padding. 

For example, I want a page to have a group of simple icons with text beneath each one. I chose the Features template because the layout seemed to suit this. But it autofills this entire image block with the icon, making it very large, not the size I uploaded it. I'm thinking I can fix this by adding in padding around the image to shrink it, but I don't see a straightforward way to do this. Any tips?

You can add Spacer Blocks to create padding