When photographing nonstandard station marks such as chisled crosses, rivets, or nonstandard disks, it is useful to include a reference item in the photograph to indicate the scale. You can download and print a set of photographic scale rulers from the following PDF file. If you use heavy duty glossy photographic paper, you can make a set of inexpensive, relatively durable rulers to use in your photographs.
Click to download the PDF file
(15.2 kb). Be sure to set the "page scaling" option to "none" when printing in order to obtain an accurate ruler.