Size Information: Ruler overall size about 160mm/6.3inch wide, 160mm/6.3inch long, 5mm thick, hole: 1.5~10mm, slot: 1.5~10mm, please refer to the picture for detailed information. Specifications: The ruler is engraved with a knitting needle conversion chart, 21 small 1.5~10mm holes, which can help you quickly confirm the size of your knitting needles; WPI grade, front and back engraved with inch and cm two scale units of the ruler Angle Gauge: Align the yarn with the vertical line and slide it over the gauge to find the degree line that best matches the twist angle to help you measure the twist angle. Multifunctional: Made of high quality wood, clearly marked, double-sided engraving, multi-functional, you can quickly determine the needle number, WPI and length. 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!