Configuring CSS for Recent Posts widget appearance

Was able to add Post Indexer, and was also able to add widgets to the front page of my blog. Whats happening now is that my widget size is 100%, but my post content is not optimized for 100%. How can i adjust the look and feel of the posts using the Recent Custom Posts Type plug-in? Or is there another plug-in that will get me closer to my goal? Ill post a pic of what i am trying to accomplish