Hi Don! @don-muller
Welcome to the myFOSSIL community! We are glad you’re here.
I can help you out on your question, as that is exactly how we intended that the scale bars be used! 🙂 To double check, you can always print out the scale bar page and then compare against a ruler. We hope that this set of scale bars will be useful to many community members. Have fun photographing!
Thanks,
Eleanor