There is a great way to make Finder even more awesome. This is to enable folder sizes to be visible within Finder. This means you can directly see how big a folder is within Finder. You can also do some really cool things such as sorting a Finder window by size, and it will include folder sizes. I think this is a great way of seeing how big some folders gets. All you have to do is enable the option within Finder and propagate it through your Mac.