To Get Perfect Sleeve Measurements:
Keep your arms straight. Unbutton your sleeve cuffs. Take two measurements.
E+ F = Left Sleeve Length
E+ F = Right Sleeve Length
E + E = Shoulder
Half Shoulder (From the centre of the neck to the Shoulder Seam) enter in box "E".
Sleeves (From the Shoulder Seam to the end of the unbuttoned Sleeve Cuffs) enter in box "F".If you do not have a shirt that fits well then measure to the knuckle of the small finger and minus 1 1/2”. Repeat if necessary with other arm.