there's a really nice program here on the site in the downloads section that you can use to measure them. All you have to do is take a picture of them with a ruler or some onbject of known length in the shot. Make sure the snake is flat on the floor and the picture is from directly above. the snake doesnt have to be straight though. You click on both ends of the ruler, then you click and "connect the dots" down the back of the snake. It's a really nice setup. If you decide to try it and need any help feel free to pm me.