Batz was nearly fired yesterday...

[Andromeda18_]

There's a formula used to calculate a person's Body Mass Index (BMI) and doctor's use it to see if a person's fat, thin, etc.
If your BMI is:

under 20 - you're underweight
between 20 and 25 - you have normal weight
between 25 and 30 - you're overweight
over 30 - you're obese

It's obvious that if your BMI is between 20 and 25 but it's closer to 25 you're close to being overweight and the opposite is also true. If that girl's really 5' and 130lbs her BMI is 25,4 wich means she's overweight.
This formula is aplied to men and women in the exact same way.