Quick Specs (all measurements in pixels):

1. Wide, flexible-width layout (default): the site width adjusts between a minimum width of 900 and maximum width of 1280 (the main column limits are 700 and 1000, roughly). Images in the main column have a maximum width of 1000, and the custom header image is 1270 in width.
2. Narrow, fixed-width layout: the site width is 700 and the main column width is 500. Images in the main column have a maximum width of 500, and the custom header image is 690 in width.