Approx 16" X 12" X 6". Has 1 large room pocket with outside pocket being small but with easily reached netted zipper pocket for keys wallet, etc. Also stretchable elastic cord on front for lacing in jackets, etc.
2 roomy exterior side pockets for things to keep a variety of items handy--water bottle, rain gear, etc.
Convenient day pack, used, but looks in new condition.