Coffee Break Training: Determining Your Body Frame Size and Its Impact on Body Weight [open pdf - 461KB]
"In this Coffee Break Training installment, we will look at how to calculate your body frame size. Body frame size is important in helping you determine your ideal body weight. Body frame size is calculated as small, medium or large. There are several methods for determining your body frame size. In this Coffee Break, we will look at how to use your wrist circumference to determine your frame size. You can take a rough measurement of frame size by wrapping your thumb and index finger around your wrist at the point where you would wear a wristwatch. If your thumb and index finger overlap, you have a small frame. If your thumb and index finger touch, you have a medium frame. If your thumb and index finger do not touch, you have a large frame."
Coffee Break Training - Responder Health and Safety Series No. HS-2013-4
United States Fire Administration: http://www.usfa.fema.gov/