Which measurement method is most effective for ensuring proper sleeve measurement?

To achieve an accurate measurement of sleeve length, ensuring that the arm is relaxed is the most effective method. When the arm is relaxed, it allows for the natural hang of the arm, which reflects how clothing will fit when worn. This relaxed position accounts for the natural contours and movements of the body, providing a more realistic measurement compared to other methods.

If the arm is straightened or flexed, it can lead to a sleeve length that is either too long or too short, as these positions do not accurately represent how the arm will be positioned in regular use. Measuring solely with a ruler, regardless of arm position, may omit important considerations like the curve of the shoulder and how the fabric will drape, which are critical for a well-fitted sleeve. Therefore, a relaxed arm position is essential for achieving the most accurate sleeve measurement, ensuring comfort and fit for the wearer.