DIMENSIONS & COMPARTMENTS: The size of this sling shoulder backpack bag about 33*16.5*7 cm, Consists of one zippered main bag, 1 small smooth zippered pockets, and bag back side additional one mobile zipper pocket to organize your cell phone. EXTERNAL EARPHONE PORT: The metal earphone port provides an easy access to earphone usage. You can put the earphone wire through the port easily and listen to music at anytime or anywhere，Ideal for vacation Outing and External sports STYLISH & MULTI-FUNCTION DESIGN: multi-function and practical design, this Chest Crossbody Daypacks allow you wear over either shoulder strap comfortably, or in the front across the chest to deter thieves.