This drawing is approximately 15"x10".
Every major Batman artist has a Batmobile designed to tell their stories based on their Batman. Neal's Batman is a hero who is a cross between Sherlock Holmes, James Bond, and the super hero created by Finger and Kane. Neal's Batman isn't just dark. He loves his cars and gadgets. His Batmobile can fly and submerge in water, but can drive down the road looking like and expensive sports car, instead of a tank. Fitting of the stories Neal tells.