Jan Sport Back Pack 15" across and 18" high.  Largest section is 5", next section is 3.5" and 2" last section.  There are also two additional sections that are zippered in the front of back.  This is a large back pack which can carry a lot of stuff!  It also has navy blue padded shoulder straps.  This pack is yellow, red, black, blue and white with a nice design.  This pack looks new!