Ribera MM or mini? Is the MM sized like the speedy 30?

yup, just like knn said, it's a more structured (not saggy) bag, the size of the speedy. the ribera has a zipper along the sides unlike speedy which zips only on top.

in fact when i went to the boutique yesterday, a woman was looking for the damier speedy but walked out with the ribera... her fashion look seemed more structured so the ribera looked better on her.