How to Measure
With a proper fitting garment on a person or mannequin, measure across the top of the shoulder from seam to seam.
Establish the chest size by measuring around the fullest part of the chest, under the armhole, and around the back of the blades. The tape should be snug, but not tight.
Measure over the shirt at the natural waist.
Measure at the fullest part of the seat.
With a proper fitting shirt on, measure from the shoulder seam to the bottom of the cuff.
With a proper fitting shirt and pant on, measure the length from the top of the shirt seam to the bottom of your pant waist band. The pant waistband should be completely covered.
Measure from the top of the seam, around and straight down the full length required. Note: Crossover should cover bottom of belt by 1.25 to 2 inches