User blog comment:Sarah Manley/Sneak Peek at the New Look - Community Activity/@comment-824313-20100831232216/@comment-802147-20100901004620

The screenshot you're basing this on was resized. The total width of the proptotype is about 1000 px. Oasis's sidebar is ~300px because of File:Latest_activity.jpg. So the article content space is less than 700px, fixed. Monaco will usually be bigger depending on your screen size.