Pugster 316l Surgical Steel Coloful Swarovski Crystal Birthstone Heart Shape Fashion Belly Button Ring Navel Piercing Body Jewelry With Color Yellow Red Blue The Hole Size is about 4.8mm~5mm, compatible with European bracelets. Ideal Gifts for Christmas, Mother's Day, Valentine's Day, Graduation Gifts, Bridal Gifts or your other special occasion you would like to make memorable. Metal: Alloy The ideal of new brand LovelyJewelry Fastion Jewelryis "Don't follow the crowd, let the crowd follow you."It is a good gift for your lover,family,friend and coworkers. if you have any question, please be free to contact us !