Hi Ayse,
We’re sorry for the inconvenience. This bracelet uses a box clasp with an additional safety lock. Because silver is a relatively soft metal, both parts may loosen slightly with repeated use, but they are easy to adjust:
1) Gently pull the two layers of the clasp insert slightly apart so it fits more firmly inside the box clasp.
2) Gently pinch the safety lock a little tighter so it closes securely.
Please contact us if you need any help with the adjustment. If you are still not satisfied, you are welcome to return the bracelet for a full refund.