Although it may appear that women with bigger breasts are more likely to develop chest wrinkles, this indication of aging can affect persons of all bust sizes. Irrespective of how large or small breasts you have, a variety of factors can develop chest wrinkles, commonly known as décolletage. This comprises your sleeping on your side, having thin skin,  genetics, and excessive sun exposure. Some degree of chest wrinkling is a natural consequence of aging, and while this might not always bother some individuals, others seek to prevent or reduce these creases.