At what point in time did thinner woman become more attractive and sought after? I remember reading that larger, whiter women were found to be more attractive in the medieval era, however I’m not sure how true this is.

by skylercoombs
Das_Orakel_vom_Berge

Do you have a particular culture in mind? Both the answer and beauty standards vary significantly depending on what part of the world you address. Based on the second part of your question, the answer to that appears to be western European, but I would hate to assume.