Thank you for viewing! This is a set with various colored nylon cords and accessory parts♪ The parts in the fifth photo have magnetic hearts, making them perfect as clasps for bracelets♡ I purchased these from an overseas website (*^^*) I'm selling them because I can't use them all‪( . .)"‬ I'm not sure what the mm size or length of the nylon cord is (•ᴗ•; )