My guess would be Coco is much closer to 27 than she is to 35, Definitely younger than 30.
As to which lady is thinnest there. As stated, Coco is slim, but I think Mia may even be thinner than Coco?
I only saw Mia in passing, so maybe those who have seen both can answer which is thinner?
Kiki is youngest there, Cici oldest.