Create a comprehensive list of ‘Size Classes’ that can be incorporated in a hypothetical futuristic sci-fi fantasy setting, taking place on a distant planet in which being absurdly busty is the global standard of living for everyone and is considered the epitome of attractiveness and indicator of status galaxy-wide, one’s bust size being directly proportional to their prominence, with even the “flattest” of people sporting chests as big as yoga balls minimum, and the very biggest having a pair of continent-sized orbs attached to their chests, with the usage of incredibly advanced robots, artificial intelligences and other heavy-duty load-bearing technology being utilized on a ubiquitous scale only to make it’s population the tiniest bit mobile; the very concept of someone being flat-chested is considered utterly taboo and hasn’t been seen or even mentioned by anyone in decades.
Include and describe the specific size ranges for each Class, with each Class being an order of magnitude larger than the one before it, as well as the practical advantages and disadvantages someone belonging to each Class brings to their surroundings merely because of their presence sporting such vast, unwieldy sizes.