Do adipocytes have minimum volume and diameter?

Here we are talking about subcutaneous (as opposed to visceral) fat, mainly I would like a professional opinion about these questions:
-does the number of subcutaneous fat cells increases over time and in which circumstances?
-do the cells have (as some people claim) a MINIMUM, finite size, after which they cannot shrink further no matter the amount of diet and exercises, and the only way to get rid of a resulting flabby pouch belly (panniculus?) is by abdominoplasty?
-people usually refer to this problem as an "excess abdominal skin", but is it really just skin? The skin should be max -3 mm thick, and the remaining layers bellow are just the subcutaneous fat cells...are there any other tissues or structures beside these cells which give the flabby look seen in patients diagnosed with "subcutaneous fat after weight loss" problem?

Thanks