How To Measure Dress Sleeve Length. Measure the length from the top of the shoulder to the bottom of your wrist bone. When taking this measurement, pull the two ends of the yoke tight but don’t stretch it.
Add the two numbers together to find your sleeve length. To measure a dress shirt’s sleeve length, start by spreading the dress shirt out on its front. This will allow for some shrinking.
Sleeve length for dress shirts are measured from the center of your back because dress shirts have a loose fitting shoulder and armhole that does not sit on your natural shoulder position.
Add the two numbers together to find your sleeve length. Wear a shirt that fits you well, and measure the distance between armhole seams across your back. Add the two numbers together to find your sleeve length. Place one end of the measuring tape at the center of the back of the collar, just below the collar band.