One of the most common criticisms of Barbie is that she promotes an unrealistic idea of body image for a young woman, leading to a risk that girls who attempt to emulate her will become anorexic. A standard Barbie doll is 11.5 inches tall, giving a height of 5 feet 9 inches at 1/6 scale. Barbie's vital statistics have been estimated at 36 inches (chest), 18 inches (waist) and 33 inches (hips). At 5'9" tall and weighing 110 lbs, Barbie would have a BMI of 16.24 and fit the weight criteria for anorexia. According to research by the University Central Hospital in Helsinki, Finland, she would lack the 17 to 22 percent body fat required for a woman to menstruate. In 1963, the outfit "Barbie Baby-Sits" came with a book entitled How to Lose Weight which advised: "Don't eat!." The same book was included in another ensemble called "Slumber Party" in 1965 along with a pink bathroom scale permanently set at 110 lbs., which would be around 35 lbs. underweight for a woman 5 feet 9 inches tall.