A new research has revealed that there are five times as many rectangular-shaped British women as those with the classic Marilyn Monroe hourglass figures.
Almost one in two British women fall into the rectangle category just like Keira Knightley and Cameron Diaz.
Using 3D imaging technology to measure 50,000 women in the UK and Europe, it had produced more accurate templates.
Its 'size 12', for example, measured 35.4 inches on the bust, 28.3 inches on the waist, 35.4 inches around the high hip and 38.6 inches on the low hip.
Analysts insisted that once it was applied in the high street, the proportion of women who find an excellent or adequate fit rose from 40 per cent to 63 per cent.
However, a spokesman added that there are three other mainstream body types in the UK.
One in three women is a 'spoon', where the hips are at least four inches wider than the bust. And slightly more than one in ten are 'inverted triangles', where the bust is at least four inches greater than the hips.
Nearly one in ten falls into the hourglass category, where the bust is at least 7in bigger than the waist while the hips are within 4in of the bust.
"People are frustrated and confused by the different sizes and fits they find on the high street," the Daily Mail quoted Alvanon chief executive Janice Wang as saying.
"The industry uses an hourglass figure, which has not changed for many years.
"However, the reality is that the most prevalent shapes are the rectangle, which is not as curvy, the spoon and the inverted triangle. Brands need to adapt to reflect this reality," Wang added.
Clothing fit analysts at Alvanon, which develops size models used by designers and retailers, have collated the figures.