When you launch our design app, there is an option to upload your image. Check the box to agree to our terms, then you can drag your image into the space above or click on it to upload your image.
There is an auto check function of the image size. If the resolution is too low, there will be a red box and warning message for you to reduce the print size. This feature ensures that the images we receive are of a printable quality, but we will still check all orders as well.
tl:dr see video below