CiviCRM Home Dashlets - making them wider, possibly span over right and left column
You can make the dashlets wider on the dashboard.

It's hard to give exact instructions because I don't know what CMS you're using - it's a good idea to post your CMS and CiviCRM version with a question for this reason - but if you're using Drupal 7, I like the Civi Bartik theme for my back end.  It makes a number of sections wider, including the dashlets.  Make sure that civicrm_theme is enabled, then go to the "Appearance" section of Drupal and set the CiviCRM back-end theme to Civi Bartik.