Physical Traits and Attraction: Symmetry, Ratios & the ''Babyface'' Phenomenon

An error occurred trying to load this video.

Try refreshing the page, or contact customer support.

Coming up next: The Halo Effect: Definition, Advantages & Disadvantages

You're on a roll. Keep up the good work!

Take Quiz Watch Next Lesson
Your next lesson will play in 10 seconds
  • 0:10 Physical Attractiveness
  • 1:41 Ideal Ratios
  • 3:09 Facial Symmetry
  • 4:36 The Babyface Phenomenon
  • 5:29 Lesson Summary
Save Save Save

Want to watch this again later?

Log in or sign up to add this lesson to a Custom Course.

Log in or Sign up

Speed Speed
Lesson Transcript
Instructor: Erin Long-Crowell

Erin has an M.Ed in adult education and a BS in psychology and a BS in management systems.

Physical traits are more important to attraction than many of us would care to admit. In this lesson, we discuss cross-cultural similarities in traits considered physically attractive, including symmetry, waist-to-hip and waist-to-shoulder ratios, and the 'baby face' phenomenon.

Physical Attractiveness

So far in this chapter about attraction, we've focused on some of the reasons that we like certain people more than others. It certainly makes sense that we get to know and typically like the people we see every day, especially if we have something in common. But, how important do you think physical attractiveness is when determining if we like someone either romantically or platonically?

It turns out it matters quite a bit. A plethora of research has shown that physical attractiveness is highly valued by both males and females. This research includes many field studies, which measured actual behavior instead of just what people say. These results probably aren't too surprising, but what do you think the researchers found when it came to identifying the physical traits that made someone attractive to another person?

I'm sure you've heard the saying, 'Beauty is in the eye of the beholder.' Logic dictates that beauty standards differ between cultures. Although both of these are true to a certain extent, it's remarkable how people across the world seem to agree on the attractiveness of certain features. Three of these features are the topic of this lesson: waist ratios, symmetry, and what social psychologists call 'the baby face phenomenon'.


First, let's discuss classic ratios. The fact that most men prefer women with an hourglass figure is well-known. Seven seems to be the magic number, as the most attractive female waist-to-hip ratio is 7:10. For example, a waist that measures 25 inches is approximately 7/10 the size of hips that measure 36 inches, so a woman with these measurements would have the ideal figure.

According to evolutionary psychology, this ratio is preferred because men are naturally attracted to women who are able to maximize the number of offspring produced. A woman with a 7:10 waist-to-hip ratio is the figure of health and peak fertility, so she is viewed as more physically attractive by men across all cultures.

Evolutionary theory proposes women also prefer men with physical features that suggest health and stamina. The ratio that is most important here is waist-to-shoulder, as the most attractive male shape includes broad shoulders and a slim waist. This results in a 'V' shape that is associated with higher testosterone, so it is viewed as more physically attractive by women across all cultures.


Facial symmetry is a universal aspect of facial beauty.
Facial Symmetry

Beyond ratios and overall figures that are attractive for romantic reasons, the most important feature that determines attraction (especially platonic) is the face. Even babies of all ethnicities prefer photographs of attractive faces to unattractive ones, and they actually prefer the same photographs that adults prefer. This provides evidence that certain aspects of facial beauty are universal.

Facial symmetry, where each side of the face is the exact mirror image of the other, is definitely one of these aspects. Symmetry seems to be considered much more attractive than asymmetry, even though true absolute symmetry is rare in the real world. Research has also found that people are more attracted to average faces. There have been many studies that merged photographs of several people into one composite image, which averaged every facial feature.

To unlock this lesson you must be a Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use

Become a member and start learning now.
Become a Member  Back
What teachers are saying about
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create an account