Features: Glow in the dark rings: Our glow in the dark earrings measure about 2 inches in diameter and come in various colors. The rings glow 4-6 hours. They are applicable for birthday parties, as a glow in the dark party favor, goodie bags, classroom rewards, toy packs, raves, clubbing, concerts, etc. Adorable gift: Glow stick earrings are safe and fun for people, you can send them to your family, friends, colleagues, classmates, teachers, bring pleasure to their family and spice up the whole evening party. Specifications: Material: Color: purple, pink, white, yellow, green and blue Size: with a diameter of 5 cm/ 2 inch Package includes: 18 Pairs glow hoop earrings Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.