I want my artwork to appear bigger/smaller on the mockup, is this possible?
Edited

On your order tracking page, the measurements of your artwork for each print location are specified beside your mockup (in width, measured in inches). This measurement is used to provide our printers with specifications on how large we should print your designs.

Although we can change the visual size of the artwork in your mockup, the actual print size will remain the same unless otherwise specified. If you would like to have a different print size on each item, it will result in a new setup. This will significantly increase the cost of your order.