Dear Customer, 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.com/help-p-1.shtml
for reference. Please don't worry, we offer a 30-day return&exchange in which unsatisfied glasses can be exchanged or refunded within 30 days of receiving. Only shipping fees will apply. Please feel free to contact us if you need. Moreover, we have updated our eyeglasses case from plastic one to cardboard case as the cardboard is biodegradable and recyclable, the most environmentally friendly packaging material to use. Moreover, we also have updated the eyeglasses pouch materials to the soft one, which can also function as a cleaning cloth for your convenience. Thanks for your kind support and understanding in advance. Please stay safe and healthy!