I am talking about length area and volume. As I reason it out in my own mind area (and volume) is based on length and involves 2 random measurements of length that are combined (with multiplication as the device of convention - could any other function be used to work as well and as usefully?) to give a measurement of area (or Volume with 3 measurements). Now I understand that this would be seen as reflecting the Classical Physical view of the world and so I am wondering if ,in this limited but easily generalised case , there would be a corresponding approach in non-Classical physics . In other words , maybe , how do you measure "length" in quantum physics? If I am talking garbage please tell me !