scale

Try this site out. It gives dimensions and scale drawings of all kinds of Sci-Fi ships...

http://www.merzo.net/index.html

I'll save you the trouble : according to that website the Imperial Class SD is 1.6 km long

for comparison the Executer Class (I think?) SSD is 19.0 km  

WHEW !!! that's BIG !

http://www.theforce.net/swtc/ssd.html

this site also talks about alternate lenghts and theories (linked from site above)

An american football field is 100 yards or 300 feet, not 100 feet.

Steve

CenterDeck,

If you can get your hands on one of the sketchbooks made from the Star Wars movies it shows a great comparison.  If you look at the first three movies, Episode 4 - 6, it shows the Rebel Blockade Runner to be a quarter or less the length of a Star Destroyer when it is taken inside a Star Destroyer at the beginning of the movie.  In Episode 6, they show x-wing flying by another Blockade Runner class starsghip and it looks a little less than half the length of a Blockade Runner.  Now taking the comparisons, an x-wing to a Star Destroyer is like a tricylce being on an aircraft carrier (Nimitz Class).  This is a rough comparison but it works for visuals.

Oh, great looking Avatar....The Seabee patch!