These are the mini version of Cocoknits popular ring stitch markers made of nylon coated steel. You get 10 each of 6 bright fun colored stitch markers to you can easily mark not only the beginning of your rounds, but changes in stitch patterns, increase and decrease placement, and more. They're small and smooth and come in a cute little round box that won't fall open in your knitting bag! Mini stitch markers fit needles up to US size 7 (4.5 mm)
For needles US size 8 (5 mm) up to US size 13, try the larger version here.