The best way to resize your files is to use photo editing software like Photoshop. You can also use the free online tool photopea.com. Please follow the steps here to set the print size correctly. This method allows you to upload your files as “Print ready files” which is the best for fine art printing.  If you don’t have access to any photo editing software, you can use our online design tool available on each product page. This tool allows you to simply upload and resize your images online. The online design tool works best for prints smaller than 18×24.  If you need help resizing your files, please email us your files and details and request to resize them.