In the early times health was the most important feature of the women's beauty. Then the epoch of romanticism came and paleness became the sign of depth of intimate feelings. The woman of this period had to be pensive, sad, if tears shined in her eyes when she read verses it meant that she carried away into the other world that was much more ideal than ours.
Before the European style came to Russia, beautiful Russian lady was considered to be white-faced, dark-browned with pink cheeks. And if she was a crummy woman with high bust she didn't have lack of admirers.
It is interesting, but some men liked women with long ears and Russian ladies sometimes stretched their ears purposely.
S. Collins - an Englishman who was a doctor of Alexey Michailovich - described the thoughts of Russian ladies about their beauty in satirical tones: "Russian women think that plumpness is a real beauty. Oh, God, give me plumpness and I will give you beauty"
N.G. Chernyshevsky described the peasant's ideal of beauty, it had to be a healthy, blooming woman (milk and blood). The Russian women's health was meant the normal labor life and prosperity. The woman of such kind could become a good assistant in work, a perfect wife and mother.
There weren't any definite standards of beauty in the 20th century, but if we look at the models, the appearance of a beautiful woman looks this way: they are no lower that 170 sm and have an advanced breast, a narrow waist, wide hips and long legs.