Ues the form below to calculate the ideal and largest print size we can produce from your image. You'll need to know the pixel size of your image.
On Windows right-click on your image and from the resulting menu, click Properties. From the Details tab, you will be able to see the Width and Height of your image in pixels. On Mac OS X, right-click on the image (or press cmd + i) and from the resulting window you'll be able to view the Width and Height of your image in pixels.