24" is the shortest cable with the options set. Instead of ordering a bunch of 16" cables needles, I was just using my bamboo needles, but I love the nickel-plated so much that I ended up learning Magic Loop with a 40-47 in. cable for smaller circumferences rather than a 16". I love ML. I no longer use dpns, and seldom use 16" circs--for a hat, for example, I use magic loop and use one needle from beginning to end, just changing needle tips if necessary for ribbing.
Heather, Mama to DS(10) DD(7.5),DD(6)