The standard pocket is 5 1/4 X 5 1/4 inches.  It has a secured zippered section on one side and a 3" diagonal corner slip pocket on the other side.  A single klip is attached to the coordinating side with the corner slip pocket so that gravity can keep the adminstered items secure.  Initially, the pocket was designed to hold ID, credit cards, cash, and lip balm within the secured zipper section and a cell phone on the back slip pocket for easy and convenient access.  Each pocket comes standard with 1 klip, however, may be worn with 2 klips.  Each pocket has a grommet in each corner which allows it be worn with 1 or 2 klips.