Place your hand flat on a surface with fingers together and thumb relaxed
Measure from the base of the palm at the wrist crease to the tip of the middle finger
Use a ruler or measuring tape aligned straight along the center of the hand
Keep the hand fully extended but not stretched
Record the measurement in inches or centimeters
Measure the dominant hand if you need a standard reference
Repeat the measurement for accuracy
Use the same method each time for consistent results