This unit had a front flap enclosure that fastens in two places. There is a front zipped compartment about 21 x 13. Inside underneath the flap is a key fastener, mesh compartment, three pen slots and an iPhone, IPod type pocket. Inside is a pen holder type side is one divided compartment the fill length and width of the case. Outside is two elastic enclosed compartments. The shoulder strap extends to 20inches above the top o f the case. On the top is one small loop to hang the  bag on a door knob or hook.. on the back is a full,length mesh pouch that is 7” high. This is a nice case and had been only used one or two times.