The Prym knitting calculator is an essential tool for knitting jumpers and other garments. It saves you a lot of time, as you can use a knitting sample to determine the needle sizes you need, as well as counting stitches and rows according to the size of garment you want and the thickness of your yarn.

With this knitting calculator, you can first determine the number of stitches and rows per 10 cm to determine the knitting sample. Next, the calculator's cursor can be adjusted on a scale from 8 to 49 stitches per 10 cm. Finally, the display window shows the stitch and row numbers for lengths from 1 to 100 cm.

This sturdy plastic knitting calculator measures 15 cm x 15 cm.