Adhesive Pocket

These are self adhesive pockets.  Just peel the back and attach them to any planner or folder and it instantly becomes a little pocket to store anything your heart desires, assuming it is within the width of the pocket itself. 

The smallest pocket is 3.5x3.5 and fits nicely into a hobonichi or a personal sized planner, and the largest one is 5 inches wide by 4.5 tall, better for larger planners.