The Hole Size is about 4.8mm~5mm, compatible with charms, European bracelets.nMetal: Alloy, Base MetalnLive Love LaughnMoney-back Satisfaction Guarantee, and if you have any question, please be free to contact us !nDemiJewelry launches new products monthly! Its charms are ready for each of your moments, to surprise you, and to record your wonderful life! We believe that: life is wonderful, you get what you give!nThere is many new stly fashion bracelet in DemiJewelry Store and You can choose any your favorite bracelet. We offers a specialized customer service team that is available seven days a week to answer any product questions before, during or after the purchase. If you're not satisfied for any reason, you will receive a full refund and free return shipping within the U.S. if you return your purchase within 30 days.