Customizing Image Width

Hi all,

I’m running/launching a small publication site dedicated to bringing strong stories with good imagery. Right now I’m having trouble getting the imagery specs correct.

It’s a two column theme and I opted to go without the right sidebar on article pages. Now the text spans across the content column and where the sidebar used to be, but when the images are uploaded and render they are stuck within original constraints (624px) when I’d like for the images to span as far as the text (approx. ~930px).

I;m guessing that there is some custom CSS that I need to implement, but I’m not really sure where to start with that. Does anyone have any suggestions or fixes they could recommend?

All help is appreciated!

Thanks in advance,
Abbott