WPI Specification: Quickly determine the WPI rating by counting the number of yarn wraps per inch or laying the yarn along the black strip until you find a match. Gauge: Knitting needles are made in US 0-15 and metric 2-10mm. this hole can help you quickly confirm the needle size. Cross Stitch Gauge: Shows where to start stitching, how to count stitches and how to find the designed stitch size. Scales are available for 11, 14, 16, 18, 22, and 25 count fabrics. Multifunctional: Made of high quality wood, clearly marked and multi-functional, you can quickly determine the needle number, WPI and yarn weight. A perfect multifunctional sewing and knitting tool for everyday life. Convenient : The sewing and knitting tool ruler is perfect for beginners to start sewing on their own with the help of the ruler, a practical tool to save your time and effort, and an ideal gift for sewing enthusiasts!