Im not referring to fashion based shape but anatomical shape. The vast majority of women are rectangular, gain fat all over and have no difference between bust, waste and hip measurement.
About a quarter of women have a smaller top half to bottom half, the smaller/narrower top half may have small bust measurement ( rib cage) but can have any cup size or volume of breast. But the width of shoulders and rib cage/circumferential bust size will be lower than their pelvic width. Fat is predominantly deposited in their buttocks and thighs. So they often look slender on top but buxom below the waste.
Finally less than 10% have shoulder and rib cage as wide as pelvic width but with fat deposited both above and below the waste giving classic hour glass.
Rectangular can have any variation of measurements but their bust/waist/hip measurements will be similar so 34/30/34 or 50/44/50.
Pear shape would have 30/24/44 or a bigger pear maybe 40/32/54
An hourglass will have 36/26/36 or 50/38/50.
Our bodies follow patterns in the way fat is deposited. Pears will have few fat cells above their hips with fat deposits in buttocks hips and legs. Rectangular classically around the abdomen and hourglass in back, bust and hips/ buttocks.
The fat distribution is partly the result of evolution and g conveys advantages and disadvantages.
In hotter climates you don’t want fat all over the body. In temperate and cold climates you need more even distribution.
Women need fat stores for our fundamental function and that is to produce milk. Post puberty our bodies are designed to produce babies and milk to feed them. Like any other mammal we are adapted for this function.
Most women who have bf for an extended period will have noticed that it is often harder to lose weight the longer you feed for and you build up fat stores in weird places.
Obviously, we have made great inroads in overcoming natures control over our bodies. Diet, gastric sleeves, plastic surgery and liposuction can dramatically change our body, but it’s very difficult to change our basic skeletal framework.
The study of human morphology is fascinating. But you need to look further than the celebrity and fashion world to understand the way our bodies differ and how those differences have evolved.
Morphology is often used as a basis for epidemiological research into human metabolism and disease processes. An example is the incidence of heart disease in women. A few years ago a study found that having a pear shape( fat distributed mainly around the hips and legs) was possible an indication of lower risk of heart disease . Unfortunately the evidence is still inconclusive. We do know that adaptations in order to survive in colder climates did lead to an increased risk of heart disease but having more body fat resulted in greater rate of survival to adulthood and therefore being able to reproduce. There is no point being skinny and potentially heart disease free if you can’t survive the cold winters.
Sorry I’m preaching but I’m fascinated by body morphology and the adaptations we have made, via evolution, to adapt to every part of the world. And it has nothing to do with fashion.