Images in blog posts too small

Is there any way to make the images bigger in the blog posts?

http://www.gabrielleorcutt.com/2013/02/17/leslie-shanes-hot-pink-and-lime-green-wedding-wedding-colors/

You can set the size of the image when you import it, even easier is to edit in visual mode, click on the image, you should get a frame appear around it, drag one of the little corner boxes and it will re-size proportionally to as large as you want it.