i'm 63 inches tall people. 63 OK.
and i'm 99 pounds apparently.
this i have a bmi of 18.

http://www.healthchecksystems.com/bmi.asp
A BMI Value of less than 18 may be unhealthy. You may wish to visit your doctor to see if you are at a healthy weight. A BMI of 18-19 is optimal
GO check yourselfs out people :p