No Tangle Thread Bobbins. Great For Kumihimo Or Macramé. Made Of Flexible Plastic. Medium 3 1/2 Inch Diameter. Quantity: 4 Bobbins. These handy thread bobbins are great for Kumihimo or macramé enthusiasts. The flexible plastic allows you to flip open the bobbin and wind string or ribbon on to the spool. Flip the plastic back down over the thread after you have wound it around the bobbin. The patented protective locking feature prevents threads from unraveling and tangling. The bobbins are stackable and will snap together for easy storage. Measurements: 3 1/2 Inch Diameter. Quantity: 4 Bobbins.