There's a program you can download (I think we have a copy of it in our own download section of this forum). You take a digital pic of your snake next to an object with a known length. You have to take the picture from directly above, not at an angle, for it to work. Then you open up the pic in the program and follow the directions to get a pretty accurate measurement.

I'll check our downloads and see if it's there. If not, I"ll find a link.