The maximum allowed image size expressed as WIDTHxHEIGHT (e.g. 640x480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of <a href="http://en.wikipedia.org/wiki/Exchangeable_image_file_format">EXIF data</a> in the image.