Product Size:You will receive an acrylic sewing ruler, the size is about 70mm/2.7inch wide, 160mm/6.3inch long, 4mm/0.23inch thick, our this multifunctional sewing ruler can meet the needs of daily use. Twist Angle: There is a protractor on the lower end of the tool to help you measure the angle of twist, and also reminds you which direction is S and which direction is Z! Simply move the yarn in this direction. 12 holes: There are 12 small holes of different sizes on the tool, the one in the top left corner, you can pass yarn or ribbon through the holes and also hang it on a wheel or keychain, the other holes can be used to pass thread through the yarn. Concave and Convex Grooves:Convex grooves are used to hold the spinner in place and prevent yarn from spreading out, simply lay the yarn along the grooves until you find a match, you can use it to check the twist per inch at the yarn formation stage. Easy to Use:The sewing and knitting tool ruler is perfect for beginners to start their own sewing with the help of a ruler, it is a time-saving and practical tool and an ideal gift for sewing enthusiasts!