The academics say that the Fantastic Four beauty has the precise ratio between waist and hips for the ultimate sexy strut, reports the Telegraph.

Hair removal firm Veet commissioned experts from Cambridge University’s maths department to look at famous women to see what gives them their wiggle.

The academics found that it is the ratio between hips and waist that puts the sway into a woman’s walk—and the nearer that ratio is to 0.7, the better.

This ratio provides the body with the right torso strength to produce a more angular swing and bounce to the hips during the walking motion. Therefore, a woman with a 25-inch waist and 36-inch hips would have just the right proportions to carry off a sexy swagger as she walks, like Alba’s.

The sexy star’s wiggle beat off similar sashays from Desperate Housewife Eva Longoria (0.67), Tomb Raider star Angelina Jolie (0.75) and even Marilyn Monroe.

While Monroe was a fraction off the target ratio with 0.69, the Cambridge team said that Alba had the perfect proportions.

(V.The Times of India del 26 de agosto de 2007).