I wouldn't expect anything else at that size. I would hope that they were the work of Nature/God and not Messrs DuPont or ICI.
Surely the whole, 'how far south will they go?' is part of the fun of releasing an ample cleavage from it's restraining equipment. In Emma's case it might be so far south they need their own visas, but I'm sure I'm not alone in being curious to find out!