Measure from shoulder seam to the cuff (this is your dress sleeve length, rather than your arm length). Start taking sleeve measures from the center back of the neck and move to the end of the shoulder at the top of the arm; Size Chart (In inches) These are garment measurements. S Some brands may also use different dress lenghts. How to measure dress length from shoulder . Measure from your shoulder to just past your wrist bone to where you would like your shirt cuff to sit. This is the width of your shoulder. Shoulder to shoulder:measure this length from one shoulder to another. Measure from the highest point of the shoulder to the desired hemline. Required only for sleeve dress. Measure from the shoulder point, and take the tape through the bust point, then down to the hem at one side. Place the tape close under the arms and make sure the tape is flat across the back. Always slightly bend the elbow when measuring to allow for extra ease. Button up the shirt and ...