I've looked at 2 jewellery listings and a clothing listing and they look professional. Your refund policy is fair but keep in mind Paypal can override anyone's refund policy and if a buyer opens a dispute they'll receive a refund from Paypal even if you know they have lied however you can appeal Paypal's decision. Also never leave positive feedback with a negative comment for a buyer - it's a policy violation. The option to leave neutral or negative feedback was removed a few years ago. I wish you well.