In crochet, a stitch marker is a mnemonic device used to distinguish important locations on a work in progress.
[2] Stitch markers can also designate attachment points for components of a multi-part project, such as a sleeve on a sweater.
[3] Crochet often employs complex lacy patterns where stitch markers are helpful.
[3] Specific advice from crochet expert Edie Eckman includes: "Avoid the round markers meant only for knitting; you need a type that can be opened so you can hang it on a stitch.
For these reasons these two textile arts require different kinds of stitch markers.