To Get Perfect Sleeve Measurements:
Take two measurements.
E+ F = Left Sleeve Length
E+ F = Right Sleeve Length
E + E = Shoulder
Half Shoulder (From the center of the neck to the Shoulder Seam) enter in box no 1 below.
Sleeves (From the Shoulder Seam to the end of the Sleeve Cuffs) enter in box no 2 below. Repeat if necessary with other arm.
Shoulders Measure seam to seam. Measure seam to seam.