A custom, perfectly circular, small modern hoop. Opens and closes with a hinge. Pull at back hinge to open. Push to lock onto post and listen for a "click" to ensure it's locked properly. Dipped in silver with a high polish. silver-dipped brassfinish: high polishlatch back product measurementslength: 0.67" / 1.7cmwidth: 0.7" / 1.8cmdepth: 0.16" / 0.4cmweight: 0.12oz / 3.43g