Show all images on same line/row in Image Picker

Hello! I've almost got my form all themed out. I'm just having trouble with Image Picker. The images all need to be on the same row. I've played with the CSS by inspecting element in Chrome. If I change the widths to 180px I can get them all on the same row together. But then there is a lot of space under it. 

From my understanding, I'd need to go in and manually override these image sizes then add a CSS rule for that i-frame to get it to be a shorter height? Since this form has to be mobile friendly, I'm guessing I would then have to rewrite the rules to get all the images to stack up on top of each other....? 

The form is set to be responsive. I've tried to manually override the width of the form to 100% to see if that helps, but nope!

Well, changing the image sizes should fix that. No need to add a custom CSS codes, just change it from the widget configuration:

If you want the previous size to fit, you need to adjust the form width in order to have them into a single row.