Dear Adele, thank you for your comments. We understand that choosing a perfect frame size online can be tough sometimes so we suggest that you could please check this link https://www.firmoo.co.uk/help-p-167.shtml for reference. We offer 30-Day Exchange & Return: Unsatisfactory glasses can be exchanged or refunded within 30 days of receiving. Only shipping fees will apply. However, during this challenging time, we have extended the returns period from 30 days to 60 days (from the date of receipt) for the time being. Our CSR will reach out to you via email within 24 to 48 hours to help you out. Please check your inbox or spam mail. Thank you and stay safe!