This product has been used successfully for many years in x-ray filing systems. It is a great way to protect an X-ray while at the same time provides key information for organization. They can be plain but are often printed and some are even colour coded with a border for easy visual identification. Standard sizes are (14 ½" X 17 ½" Open End) or (17 ½" X 14 ½" Open Side). Custom sizes are also available.