Start from your account: log in, open the order, and pick the pieces and the reason to send back. We confirm and email you the return address. You have 30 days from delivery, on any stock piece, returned unworn and in its original packaging. Custom and personalised pieces are final sale. If you're in the EU, your legal 14-day withdrawal right sits inside this 30-day window, so the same steps cover it. Return shipping is yours to arrange, and we'd suggest a tracked service. If you'd rather sort it by email, write to support@sciencejewelry1824.shop with your order number, and we'll walk you through it. Please check with us before shipping anything back, so we can give you the right return address and your package doesn't get lost.