Place one end of the measuring tape at the button joint on band of the collar and measure along the collar up to the center of button hole.
Place the measuring tape just under the armhole and make sure the tape is flat across the front till the other end under armhole.
Place the tape on the center of the shirt’s torso and measure from one end to the other.
Measure edge of hem from one end to the other.
On back of the shirt, Measure one shoulder to end of the other shoulder.
Place your tape at seam of the armpit and measure to the top of the sleeve.
Measure from the shoulder seam to the end of cuffs.
Measure from the highest point of the shoulder besides collar to the hemline.