The phrase "less is more" may be influencing many women's decisions on how large their breast implants should be. In fact, many plastic surgeons say smaller breasts seem to be more popular these days. More women are choosing conservative, more natural looking breasts, and some who have breast implants are even looking to downsize.

One of the reasons some women choose a more natural-looking size for their breast implants is so they will enhance their appearance but still look real.

"Breasts are mostly fat and skinny girls don't have huge breasts, except in very, very rare circumstances,'' explained a California-based plastic surgeon to The Orange County Register.

While unnaturally large breasts usually signal that someone has breast implants, there may be some other ways to spot whether or not a woman has them. According to a recent article in Men's Health magazine, other clues include breasts that are too close together, sit too high on the chest and have visible scars.

Of course, some women don't care if the fact that they have implants is obvious. Others want the most natural appearance possible. Those considering breast augmentation surgery should consult with a licensed, board-certified plastic surgeon to discuss the ideal size and type of breast implant for the look they wish to achieve. In addition, viewing before and after photographs can help potential patients decide if the surgeon can provide a satisfactory result.

According to the American Society for Aesthetic Plastic Surgery (ASAPS), breast augmentation surgery remained one of the most popular surgical cosmetic procedures in 2011, with more than 316,000 total surgeries performed by ASAPS members.

The cost of the surgery varies by location and the type of implant -silicone gel or saline - being used. ASAPS reports the average cost for silicone gel implants in 2011 was $3,694, and the cost for saline implants was $3,308.

In addition to improving the size and shape of the breasts, many women choose to undergo breast augmentation surgery to improve their self-esteem.