The plastic clip is about 7cm long.Suitable for almost all coils. Made of quality plastic, lightweight, thick and not easy to break, reusable and can serve you for a long time. Package includes 100 clips for holders enough to meet your needs. Keep your spools and bobbin together by color,perfect for organizing thread and bobbins,Easy to use They work well for organizing spools and hold the spool with a suitable spool, a nice accessory for a tailor, more convenience and time saving. Description: Clip on the bobbin thread spool to prevent it from coming loose, organize the bobbins and keep them together with the corresponding bobbin. The bobbin thread clamp is small and light, convenient and portable. It is a good helper for storing the bobbin when sewing. Match the bobbin and the thread. It fits most types of bobbins. Reusable design means you can use them over and over again for years. Great sewing accessory for a tailor or seamstress. Great gift for your wife , girlfriend, mom and who loved wire organization. Material: Plastic Size: about 7cm Character Made of high quality material, fits most spools of thread, easy to use and very practical. Ideal for keeping thread and the matching bobbin together. Ideal for quilting and for workshops and classes. Good advice: Please allow 1-2mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.