Base square measures 18" x 8", but the sides poof out for more storage capacity. Side panels measure 11" tall. Again, the sides spread out more.

Two zip pockets on exterior. One zip pocket and one open phone pocket in interior.

The imperfections: There are dirt spots on the bottom exterior and the bottom interior. They aren't large, but they are there. The pictures offer a better description. Other than that, this bag is in great condition.