How do you know if you suit short or long hair? Apply the 5.5 cm rule now!

Do you know the 5.5 cm rule? It’s a simple rule when you want to choose the length for your hair. This method is going viral on TikTok to determine whether short or long hair suits your face better through a not-too-complicated measurement.

Last autumn, TikToker Amy Chang posted a video titled “How to know if you suit short hair?” According to Chang, to answer this question, all you need to do is prepare 2 pencils and a ruler.

First, take 2 pencils and stand in front of a mirror. Place one pencil under your chin and the other pencil at the end point of your ear. Then, measure the distance from the end point of the ear to the intersection point of the two pencils. If that number is less than 5.5 cm, then short hair is the perfect choice for your face. But if the measurement is greater than 5.5 cm, then you should opt for shoulder-length or longer hair.

Here’s how to tell if short hair will suit you…

If you doubt that this method can help you determine whether short or long hair is your ‘true love,’ remember the words of the famous British hairdresser John Frieda. He researched his clients’ faces and found that the angle of the jawbone is an indicator that can determine whether a person looks better with short or long hair.

Of course, in case you have a favorite short or long hairstyle but this ‘mathematical’ formula indicates that it doesn’t suit you, that’s okay too. Because it’s your personal style, and the 5.5 cm rule is just a reference calculation.

However, if you’re afraid that a certain hairstyle might not suit you or you’re in the mood for a change, then this formula might be helpful.