There are 3 sizes metal color jump rings, about 6mm/8mm/10mm in diameter, 1mm thick, 4mm/6mm/8mm inner diameter; different sizes can match up with different projects, enough to meet your needs. 3 Mixed Sizes: There are 3 sizes metal color jump rings, about 6mm/8mm/10mm in diameter, 1mm thick, 4mm/6mm/8mm inner diameter; different sizes can match up with different projects, enough to meet your needs. Package Included: Totally 120 pieces (3 sizes, 40 pieces/size) stainless steel color twist jump rings, enough amount for craft making; it is much special when they are used as a connector in jewelry making. How to Use: These open jump rings are used as a connector in jewelry making. You can use jump rings with tool opener, perfect for twist opening and closing split jump rings. Wide Application: These twisted open jump rings are perfect for any project you have, whether to make chainmail armor, try out new weaves, make delicate necklaces, bracelets, anklets or something else entirely! Wonderful Gifts: Plastic box set is included, it is convenient to store the twist jump rings. It is also a wonderful gift on Valentines Day, Christmas Day, Mothers Day, Anniversary Day or Birthday for your daughter, lover, mother, or just yourself.