You know how to make mobius rings and fuse them. But what rings, how many, which size, etc., are questions you ask yourself when you want to use them in your projects. One way to make it easier to make those decisions is to string some beads with the various sizes of mobius spacers you use most often and take a photo. Then scale the photo to the size of the beads and print it out to use as a reference. The beads used here are 8mm in diameter. Another option would be to lay they spacers next to a ruler and take a photo, scale it to the ruler size, and print to also use as a reference.