Currently it auto-adjusts with a minimum size of 650w x 109h, I think, and theres the buttons, links, and search bar incorporated too somehow; Id like to see how all of that would be set-up with a fixed width.
Also a height of 200 may be too big, in my opinion. Im not really sure how 'customizable' the site is either though, but the 'sleek' look has grown on me.