When it comes to tracking down the perfect pair of jeans, there is no other piece of clothing that induces so much stress. 

找到一条上身效果绝佳的牛仔裤给人的压力比其他任何服装搭配都大。

As well as adhering to the style of the season (flared? skinny? boyfriend?), women want jeans that flatter their bottom, suck in their tummy and make their legs look longer. 

Perhaps, then, it comes as little surprise that a recent study by Tampax Compak Pearl found that 40 per cent of women struggle to find the perfect fit - and 15 per cent have even been reduced to tears in their efforts. 

But, according to a celebrity¹ denim² expert, there is a tried-and-tested formula to finding the perfect pair to flatter - and it's all about your body shape. 

Jean queen, Donna Ida Thornton, whose designs are worn by the likes of Millie Mackintosh, has devised some denim-buying hacks³.

If you have a boyish shape - similar to Cara Delevingne and Cameron Diaz - you can wear most styles, according to Donna. 

Pear-shaped women, who, like Kim Kardashian, have a smaller top half than bottom and boast fuller hips⁴ and a shapely lower half, should opt⁵ for high-waisted jeans. 

If, like Lena Dunham, you possess an apple shape you should opt for elasticated waistbands.

Women with apple body shapes, which are larger across their mid⁶-section, typically with slimmer legs, should look for plenty of stretch in a straight leg in a dark wash as they complement⁷ every curve, advises Donna.

Ladies with long legs, like supermodel Karlie Kloss, often struggle to find jeans that fit their stomach and their pins. 

Sharing her advice, Donna said: 'Ladies with long legs look best in a mid to low rise to keep the waist at the right height, whereas petite girls look great in a high rise that accentuates⁸ the waist and elongates⁹ the legs.' 

Revealing other essential tips for buying jeans, she explained that if jeans go on easily, go down a size. 

'Kicking your way into the legs isn't unusual, and the waistband should be snug¹⁰, if you can fit two fingers down the back that's good, a whole hand is not,' she said. 

When buying jeans with super stretch, she suggests looking for good quality denim that has great memory. 

'The "memory" is how quickly the denim springs back after wear,' she explains. 'Buy them firm but not overly tight. If you have "seam strain" down the legs, they are possibly too tight and this could damage the stretch.' 

She also explains that a curved or pieced waistband is ideal for flattering all shapes. 'This will be slightly higher at the back than the front and will curve into your waist rather than sit straight up,' she said.