While most commonly used in earring designs these can also be used to hang charms and dangles on necklaces. Easily remove the wire from one end, add your beads, charms, dangles, etc and close. The hoops have a loop at the top with a 1mm inner diameter so you can easily add them to earring findings or attach jumprings to hang on chains. They measure itself is 42mm (1 5/8 inch) top to bottom and the wire is 21 gauge, 0.71mm thick so you can add almost any bead to these. Package of 20.