Stitch markers are usually a ring of some sort that marks a spot in your knitting. In crochet it’s more likely to be a hook or a clasp that marks a stitch. Common uses would be to mark the start of a row or a pattern repeat. They can be as simple as a piece of yarn tied in a loop, which I’ve used. I’m currently most fond of my simple, bare, jump rings – simple rings with a split.
But I got it in my head that I needed to make some fancier ones. I’ve done it before with some polymer clay. They weren’t terribly pretty but I did it. This time I picked up split rings (wrong), and lovely little beads (wrong, the hole is too small). I happened to have some wire at home that fit, so I was able to put a couple of stitch markers together, but they’re pretty amateurish and I need to get some different supplies.