A. Specification of Yarn Count Measuring Instrument A marked and calibrated measuring instrument makes it easy to check the yarn size. By counting the number of yarn wraps per inch or placing the yarn along the black strip until finding the matching scale, one can quickly determine the wraps per inch (WPI) grade of the yarn. B. Measuring Dimensions The measuring instrument is about 1.6×3 inches (4×7.5 cm). The yarn - wrapping area per inch is around 1 inch (2.5 cm) wide and has 8 measuring rod slots. The specifications cover lace yarn 18, fine wool yarn 14, sport yarn 12, double - strand yarn 11, etc. Each slot is approximately 1 mm deep, suitable for measuring the yarn. C. Sturdy and Smooth This spinning control card is made of wooden material about 0.1 inches (3 mm) thick. It is not prone to breaking or bending after long - term use. After sanding, the surface is smooth, rarely causing the yarn to catch or fuzz. At the same time, it is safe for hands and comfortable to hold. D. Design of Yarn Ball and Rose Patterns This yarn WPI measuring instrument has a matte surface treatment, showing a wooden texture. It is engraved with patterns of yarn balls, crochet hooks, and June roses, which are delicate, beautiful, and vivid. It is both practical and decorative, adding more visual enjoyment and fun to the knitting process. E. Convenient Measuring Instrument as a Gift This sewing tool is equipped with a lobster clasp, which makes it convenient to attach to knitting works or spinning tools, etc. It can also be hung up to save space. This convenient sewing tool can be a great gift for tailors, enthusiasts of sewing projects, daughters, mothers, grandmothers, etc.