Charms compatible with Pandora charm bracelets and most brands of U.S.and European style bracelets. The unthreaded hole size is about 4.5mm-5mm Charms is Made of Copper. Charms for mom, mother, wife, nana, grandma, grandmother, granddaughter, daughter, sister, aunt, auntie, niece,best friend Charms for Mothers day.Birthday.Valentines day.Anniversary.Graduation.Friendship.Thanksgiving day.Christmas.Holiday.New Year. The Hole Size:about 4.5mm. Compatible with 3mm European Pandora charm bracelets and necklaces.DIY jewelry for Charms Bracelets, Key Chain or Pendant Necklaces.Pick the charms for mom, mother, wife, nana, grandma, grandmother, granddaughter, daughter, sister, aunt, auntie, best friend, friend for Mothers day.Birthday.Valentines day.Anniversary.Back to school.Coming of age.Engagement.Graduation.Wedding.Friendship.Thanksgiving day.Christmas.Holiday.New Year.