Hi Jennifer, thanks for your comments. There are 3 factors that affect the lens thickness namely, the prescription, the lens material, and the frame lens size.  For a given prescription, as the lens size increases, lens thickness increases proportionally.  For a minus lens, the edge thickness will increase as the lens size increases. To alleviate or reduce the thickness, it is highly recommended to get smaller lenses and a higher lens index because they are generally better optically than larger lenses size. The frame material made of plastic such as acetate or TR is also highly suggested. 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. Please feel free to contact us if you need it. Have a nice day!
 

Dear James, we are sorry to hear that. 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.com/help-p-1.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. Please don't worry, our CSR will reach out to you via email within 24 to 48 hours. Please check your inbox or spam mail. Thank you and stay safe!