If Barbie was an actual woman, she would be 5'9'' tall, have a 39" bust, an 18" waist, 33" hips and a size 3 shoe size
Barbie calls this a "full figure" and likes her weight at 110 lbs.
At 5'9" tall and weighing 110 lbs, Barbie would have a BMI of 16.24 and fit the weight criteria of an anorexia. She likely would not menstruate.
If Barbie was a real woman, she'd have to walk an all fours due to her proportions.
Slumber party Barbie was introduced in 1965 and came with a bathroom scale permanently set at 110 lbs with a book entitled "How to Lose Weight" with directions inside stating simply "Do not eat"