Size Reference: Each buttonhole elastic band measures 0.98"/2.5cm in width, 9~9.5m/10 yards in length, you can cut the proper length for daily using Multi-color: White and black, 1 roll per color, can satisfy basic sewing needs; 20pcs resin buttons are enough for adjusting and match well with the holes Good Material: Made of polyester material, with strong elasticity and good craftsmanship, will not easy to tear off, durable and practical for your sewing work Easy to Use: It allows you to cut the proper length with scissor, and to fix the rest with a pin (pic5 as reference), you don't need to worry about messing it up Wide Usage: Great for adjusting waistline of shorts, skirt, pants and other garments, suitable for kids, pregnant woman, adults, elderly and all people of different sizes