DIY Rubber Silicone Necklaces Making Kits, with 30Sets Plastic Breakaway Clasps and 10m Round Nylon Braided String Threads, WhiteSize: Plastic Breakaway Clasps: about 24x9mm, hole: 2.5mm, 30sets; Round Nylon Braided String Threads: about 2mm, about 10m/roll, 1roll.