Jeans are buttoned up and the waistband is measured from side to side with the jean laying flat, that measurement is then doubled to determine the waist measurement.
The rise is measured from the bar tack in the crotch to the top of the waist band above the top button.
The thigh is measured 1" below the crotch straight to the outside of the leg.
We measure the knee 14" below the crotch straight to the outside of the leg.
This is measured straight across the leg opening, sometimes this can be referred to as the "hem line".
The shirt is buttoned up and the chest is measured from pit to pit with the shirt laying flat, that measurement is then doubled to determine the chest measurement.
The sleeve is measured from the top of the shoulder seam to the end of the arm cuff.
The shoulder width is determined by measuring from one shoulder seam to the other straight across the body.
The shirt is measured from the top of the shoulder (next to the collar) to the bottom of the shirt.