Images sizes reduced

Hello .

I use this plugin for my on-going project which requires images for radio and checkboxes .

But when I chose to have the radio button inline with 2 columns , the image is extensively reduced to 1/6 of it’s actual size which obviously hard to see .

How can I fix this so that it will get the aspect ratio 2/2 size of the actual image .

Any snippet or css to do so ?

Thanks .