This Blue Feather BobbinSaver holds metal and plastic bobbins. Bobbin threads won't tangle or unwind. The pliable holder allows for easy bobbin removal. It is lightweight, which allows the bobbinsaver to be carried in the bag for on-the-go crafting. Details: Available in multiple colors and sizes Stores over 20 bobbins Holds metal and plastic bobbins Lightweight Size Information: Regular: 13/16" diameter Medium: 1" diameter Jumbo: 1 1/16" diameter