The Hole Size is about 4.8mm~5.0mm. Metal:Copper Use Jewelry bags and express the image of JMQJewelry Charms for Bracelets Women your girlfriend wife mom sister grandma family friend and daughter son or special person . Send a good gift(birthstone) for your loved ones Special Days Birthday New Year Valentine's Day Mother's Day Graduation Engagement Marriage Thanksgiving Christmas Anniversary and Holidays . If you have any question, please contact to us JMQJewelry company was established in 2006, is a leading European and American fashion OEM jewelry company, the main products to jewelry and necklacebased. JMQJewelry from the specialized foundry in the past few years has become Fashion jewelry design pioneer.