No sew circular needle holder
Can't get any easier than this, the 15-minute circular needle holder.
Nothing against sewing, but I like this one for something a little different. Circular needles are inserted through the center holes in craft supply wooden spools and dangle by their cords.
Note on the spools - mine have 1/4" hole which fits up to a US size 10 needle. This was adequate for me, but if you require ones for larger sizes you can drill or use a needle file to enlarge the opening, or look for a larger diameter spool.
You Will Need
First, label all your spools with the appropriate needle size. For my end spools I wound a piece of scrap yarn around the spool and secured it with a dot of glue. A piece of fabric cut to size would also look nice. You could obviously embellish these however you like. I went with simplicity (also known as "easy").