There are often jokes that Russian girls are angels turning into demons before and after marriage.
But you found that no, the girls' faces are not enlarged in proportion to their bodies. Relatively speaking, their faces are not too fat. In fact, studies have long said that in places like northern Europe, because of the low temperature, people here have relatively less fat on their faces.
This is because triglycerides in fats are converted to solids at 4°C, which then age prematurely, and are then gently eliminated and excreted through normal metabolic processes. At the same time, it is also very safe, because in the subcutaneous tissue, only fat is particularly sensitive to low temperature, while adjacent tissue cells—vascular cells, peripheral nerve cells, melanocytes, fibroblasts or fat-deficient fat cells are sensitive to low temperature. This difference determines that at a certain low temperature (0-10°), fat cells are inactivated while other tissue cells are not affected.