The measurments are 11 1/2" tall x 10" wide x 3" deep. The 1"wide strap adjusts from 26" to 48". This bag is ergonomically designed to be very comfortable to carry and use. The outside pockets on one side have a tall open pocket for glasses and a zip pocket for your phone. The other side of the bag has a long angled zip pocket. Inside there is a handy key clip, two open pockets, and a pen slot.