There is a website called “Small Stuff’s PrintMini” and it has some useful things for us. First it has 1/12th scale printables which are very useful for adding lots of paper-based stuff to your setting. They also have a ruler you can print and use to measure miniatures. It converts feet to inches. There is also a calculator in which you can put the measurements of a real life object and get the exact measurements in different scales, Also a list of the different scales used in miniatures.
The Wonder of Miniature Worlds 