Here's one many of you may find useful. This is freeware, designed for accurately measuring a snake. If interested go to the link below and down lload a copy. The site has detailed instruction on how to use the software.
I knew about this before but couldn't find the site. The only problem is trying to take a good enough pic of your snake. It always is different. Like last month, it was roughly .2 inches longer according to it. But that is my fault