In just the past decade, the average woman’s breast size has gone up from a 34B to a 36C. As well, nearly a quarter of all bras sold are size D or higher, a number that has doubled over the past 3 years. Apparently, the main reason behind this trend upwards in breast size is plastic surgery. As breast implants have grown in popularity, the number of smaller-breasted women has decreased while large breasts have increased. Other factors, such as environmental factors and dietary needs, have also led to this increase naturally.