The Bobbin Clamps are good for organizing or holding all sorts of thread, bobbin, cord, twine, strings, chains and so on, and great for use on DIY, craft, sewing, embroidery, and more.SpecificationColor: GreenMaterial: SiliconeOverall Dimension: 33 x 20mm / 1.3 x 0.8 inchPackage Contents: 12 x Bobbin ClampsAdvantageMade of silicone, no rust, reusable, smooth and sturdy. It can prevent the thread from falling off, and there are no loose ends or thread tails. It is a practical present to give who is good at sewing or embroidery as a hobby.InstructionEasy to use. Just applied it on the bobbin to keep the thread tidy.NoticePlease read the measurements before ordering if you are concerned about the size.