Have you always wanted to know how you can look with short hair, or conversely, would I look better with long hair?

A simple formula gives you the opportunity not to risk prematurely.

But if your curiosity is so strong and you've always wondered what the most suitable hair length is for you, now we have the answer.

The rule of 5.5 cm.

The magic formula has been discovered by avant-garde hair stylist and product innovator John Frieda and “the secret is in the corners. John has studied faces and noticed that the jawbone determines whether someone would look better with short or long hair," says senior stylist at the John Frieda salon in Britain and Color Wow's international training director, Giles Robinson. . They say that the finish is a reliable, easy, but accurate gauge that shows whether the face fits with short or long hair.

To test it, place a straight pencil below the chin and a ruler below the ear, vertically. If the tip of the pencil goes to a point that is less than 5.5 or 5.7 cm from the bottom of the ear, you will look very beautiful with short hair and if it is bigger, long hair would be the ideal solution.

This works with Michelle Williams and Kim Kardashian (pictured) and when you think of other typical examples like Audrey Hepburn next to Sarah Jessica Parker it becomes very clear. A thing of the past is trying to take selfies with hair that looks cut off...