How to customize Double sided printing is supported. The price is the sameSelect the quantity and size you need(if you don't have the size you need, please contact customer service. We can make any size) If you have design files (Supports AI, PDF, PNG, JPG files), please send them to my email address. (Please use the order number as the email title. If you have not placed an order yet, please use your username as the email title.)If you don't have design files, you can design them on our website and send them to my email address. The website is: https://www.canva.com/business-cards/. The delivery time is: 3 to 5 days.email : [email protected] accept any language, any size.