Durable Material: The yarn bobbin is made of high quality clear acrylic, which is strong and durable, and the surface lamination ensures the product is shiny and scratch-free. Size Reference: The yarn spool is about 150mm/5.9inch wide, 150mm/5.9inch long and 3mm thick. Large size and unique design for your convenience. Winding Instructions: Pass one end of the yarn through the center hole and wrap the yarn between the petals of the bobbin. After winding several times, rotate the bobbin and wind between the other petals and continue in this manner until you are finished. Easy to Use: These bobbins are great for colorwork, knitting, smaller weaving looms, or for tidying up your leftover yarn. Quicker and easier to use for hand-winding yarn than a nostepinne and keep your yarn neater as well. Wide Applications: These large yarn bobbins are perfect for needlework, embroidery, cross stitch, DIY crafts or other sewing jobs.