For our pencil box, we wanted to have in functional for all needs. you have a section for pencils, a section for your stylus, a part for the charger, a part for pens, and a part for erasers.  we were able to do this and have enough room for many pencils, pens and erasers so that if a pen runs out of ink or a pencil breaks, there is always another one there because there is that much room!!!