The diameter of the charm's hole is about: 4.5 to 5.0 mm. It is compatible with Pandora bracelets, U.S. bracelets, European bracelets, and most kinds of charms bracelets but Pandora Me. Birthday Cake Charm with Roses Decoration fits Pandora Charms Bracelets. Charm Size (LxWxH): 11.2 x 10.4 x 10.4 (mm) Diameter of Hole: 4.5 mm fits Pandora Charms Bracelets U.S. and European Bracelets The charm is made of S925, Sterling Silver, which is suitable for daily wearing as body jewelry. We suggest you take off the charm while taking a bath, swimming, or exercising. Best gifts for mom, mum, daughter, wife, aunt, sister, grandmom, stepmother, friends, best friends, BFF, family and women. The great present for any occasion, such as Christmas, Birthday, Mother's Day, Anniversary, Valentine's Day, New Year, or any special day for you or your friends and family. Nice gift for birthdays, Mother’s Day, Valentine's Day, Christmas, anniversaries, Memorial Day, New Year's Day, Easter, and your special days. Suitable for mom, mother, mum, wife, grandma, grandmother, auntie, aunt, best friends, family, and women.