Hey Stoney, I made a measuring stick today and uploaded to the workshop...
http://steamcommunity.com/sharedfiles/filedetails/?id=842120414
Hope it helps you out. It's 32m long on vertical and horizontal axis. You can measure things down to 10cm accuracy. If you need longer than 32m, just keep adding the sticks end to end, or modify the blueprint as needed to suit your needs.
I've been modeling things in PC from real world objects such as machines and other things, and wanted to have everything in correct proportion, that's why I made this. I was tired of using wall/floor pieces to guess the height and width of things, so this is much better.