Nice little knitting gauge ruler that does not take up much space in the yarn bag, but is always nice to have on hand.
You simply place the counting frame on top of your project or your knitting sample, and then you count the number of stitches and rows. The window in the counter frame is 5 x 5 cm.
While you can measure the tension of your project, you can also measure the size of your knitting needles from 2-9 mm.