Manufacturer recommended age: 6 years and up.The best friends necklace is specially designed for girls who have best friends and love their best friends.Chain length:16.2 inches+2 inches extension.Crystal Pendant Charm Size:1.0*0.57 inches.The rainbow BFF friendship necklaces jewelry comes with a nice jewelry box which makes it a special gift for Friendship Day,Valentine's Day,Easter Day,Best Friends Day and Christmas.Jewelry Protection:The best friends pendant necklace was plated with rhodium and can be used for a long time if protecting it properly.Please protect jewelry from contacting with water,sweat,perfume and other chemicals.Please avoid strenuous exercise when you are wearing this charm necklace.When sleeping or not wearing, please put pendant in jewelry box.Perfect Jewelry Gifts: The women BFF friendship necklace gift is not dainty.The main pendant is stacked with rainbow crystals,which makes the necklace a perfect jewelry gift for girls and Women.Because rainbow color are warm and magic color,which makes people feel warm and kind.So it will also be an excellent gift for friends,sister and mom.Enjoy this shiny and sparkling necklace