Customize your own router bit storage with these bit holder inserts and always have your tools organized and close at hand.  New style PVC holders are 22mm x 9/16" high and are available in 1/4", 8mm. 3/8", or 1/2" packs of 20. Tight enough to use in a horizontal or vertical orientation. 

If you don't want to drill and make your own storage container, a ready-made version is available. It holds up to 100 bits and takes any of the interchangeable black inserts shown below. 12.6" square X 1.77" tall.