Can a multi picklist menu's width be set with CSS?

I have a multi picklist with 10 options. Each option is multiple words. The width of the picklist cased it to word wrap the last word of some of my options, so I shortened my options. This caused the picklist to narrow (autofit) so that it was still causing the last word of the now shorter words to word wrap still. Can I modify this width in CSS or would I need a custom field renderer? Thanks