Do my self-launched art prints have to be available in all sizes?

No, your self-launched art prints do not need to be available in all sizes.

You should upload the highest quality file that you have so that it can be produced in as many sizes as possible for your customers. But even if your file is only large enough to print at 5x7, that's ok! When processing your file, the self-launch tool will automatically select all the sizes that will work for your file. 

Please note that if you remove sizes from your self-launch art project, you will not be able to add them back in at a later date due to limitations in our tool. If you would like to later add more sizes to a self-launch art project, you'll need to launch a new project and deactivate the original to avoid duplicate pieces in your Artist Store.

See this PDF for more info on best practices and tips for launching art prints.