Flat measurements 11-1/4 x 22
Verified Buyer Reviewed by Hustle from East tn on Wednesday, June 17, 2015
I use this for recreational kayaking. I put the stuff I don't want to leave locked in the car in this, and then inside the rear storage compartment on the kayak. It's sheerly a security measure in case I flip. I can easily fit my keys and women's wallet inside with enough extra room for food or extra clothes if I wished. The flat measurements are 11-1/4" wide and approximately 22" in height, of course some of that is used when rolling down the top. The first time I tried it, I couldn't get any air to push out. The second time there was a little leak if you pushed up at the top (probably didn't roll quite right). I think it's great, and works for what I need.