This Cousin DIY Jewelry Findings assortment should have the sizes you need for your jewelry and craft projects. The kit includes 1000 pieces of open silver jump rings in assorted sizes and gauges with additional silver lobster clasps. Sizes include: 4mm 5mm 6mm 7mm 8mm 10mm in 19 gauge and 21 gauge. Lobster clasps are silver in 12 x 7 mm size. Comes packaged in a clear round storage container allowing clear viewing and flip up tabs on lid for easy access to one size at a time.