If Barbie were a real woman, her head would be the same circumference as her waist, meaning she’d have room for only half a liver and a few inches of intestines, (as opposed to the usual 26 feet). The result: chronic diarrhea and death from malabsorption & malnutrition.
To look like Barbie proportionally, a healthy woman would need to add 61 cm to her height, subtract 15 cm from her waist, add 13 cm to her chest, and 8 cm to her neck length.
Because Barbie’s neck is twice as long as the average human’s, it would be impossible for her to hold up her head. Her legs are 50 percent longer than her arms, (the average woman’s legs are only 20 percent longer than her arms). She’d also have to walk on all fours (her feet are so disproportionately small, her chest would pull her forward onto her toes).