These very convenient row counters can be used with both thin needles and thicker knitting needles, ranging from size 15 to approximately 7mm. They come with number beads from 1 to 0. When you reach the end of a row, you pass your knitting needle through the loop next to the corresponding number. By using an alpaca marker for the tens place and attaching the ones place to the knitting needle, it's easy to keep track of the row you're on. This is a very convenient item. They are lightweight and won't be a burden. The number 9 is a different color, so you can easily distinguish between 6 and 9, allowing you to knit smoothly and clearly. The set includes 5 markers. The last three photos show example uses, and they can be used with needles from thin sizes up to approximately size 12.