Large bag measures 16? x 12? x 3? Half of this bag has one clear compartment with a zipper closure. The other half is a clear compartment with zipper closure and half elastic pockets. The outside on the back has a pocket that goes across the length with no closures. Smaller bag measures 8.5? x 8? x 1.5? and attaches to the first piece with Velcro. It closes at the top with a zipper and has pretty chocolate brown lining. On the outside, one side is a clear compartment with zipper closure. The other side has a clear pocket, no closure and an elastic pocket with a clear flap, but no closures.