You must be the copyright owner of the images.
Check detached: 8 1/4'' x 3'' and check with the stub: 13'' x 3''. Once you've figured out where you want to go with your customized checks with photos, simply upload your images. You may think that creating your own checks is a difficult task to complete, but you'll be pleasantly surprised at just how precise your custom business checks will turn out once you receive them.