The outside messurements are 10*20*15 1/2 tall. The boxes on the bike outside meassure 39 inches wide. On the inside lid of one of them I cut a panel and fitted a door for small stuff. It was a pain to cut due to being stainless steel. I used up a 20 pack of dremel cutoff wheels. Finding a latch to keep it closed was the biggest challenge. I don't like the slide bolts I used, but couldn't find anything better.
The other 10% are sociopaths , serial killers and KLR riders. You wont get much sympathy from them.