Gimaix 12x Electronic LED Flash Lighting Bracelet Pretend Play Party Wristband &hellip; LED Bangle Bracelets are great for all occasions External diameter: 8.5cm(3.35"), Internal diameters6.5cm(2.56") Replaceable batteries ( 3 x AG3 ), lasts over 10 hours Package indludes: 12 x Led Bracelets It is a good toy for a concert or party prop