Features: Made of flexible rubbery plastic. It can store bobbins of industrial sewing and machine, household sewing machine. Easy to remove a bobbin by hand, no tangle or unwind for thread. Shaped like oval and hollowed out. Fit for different sizes of metal or plastic bobbins. Specification: Material: Rubbery Plastic Weight: 50g Outer Ring Diameter: 13.5cm/5.31in Inner Ring Diameter: 9cm/3.54in High: 2cm/0.79in Color: Blue, Purple (Optional) Package Includes: 1 x Bobbin Holder Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.