Fun Central M614 21pcs, Glow in the Dark Bracelet and Necklace Kit, Glow In The Dark Necklaces, Glow Stick Bracelets - Assorted SIZE: Our Glow in the Dark Stick measures approximately 5 mm in width which is perfect for everyone! FEATURES: The Glow Stick Bracelets will glow 2 times (4-6 hours each). They are perfect when paired with any of our glow rings or glow necklaces to complete your outfit. PERFECT FOR PARTIES: Including glow in the dark parties, Halloween parties, Christmas Parties, New Years Eve, Raves, Concerts and Neon parties. INCLUDED: Each pack includes 21 glow sticks and 21 connectors. MANUFACTURING: Made from high quality material that is safe, non-toxic and environmentally-friendly.