This is my solution to the problem of storing circular needles neatly and in an organized way so that they are easy to find when needed.
I bought 15 "snap-envelope" style pockets and a three inch, three ring binder. Each pocket is labeled and holds one size of needle with as many length variations as I own. Now that I know the "Magic Loop" technique for smaller circumferences I no longer buy anything other than 32 inch, but I do have a few shorter ones from before that time. I have also used the pockets to store a few double-pointed sets.
I decorated the outside of the binder with a picture gleaned from the internet. It is of a painting of a little girl knitting.