Determining the correct head circumference is essential when selecting a helmet for safety purposes. The procedure involves using a flexible measuring tape to ascertain the distance around the head at its widest point. This widest point is typically located approximately one inch above the eyebrows and ears. A consistent and accurate measurement will provide a baseline figure in inches or centimeters for referring to helmet sizing charts.
Accurate head measurement is crucial for ensuring proper helmet fit, maximizing protection in the event of an impact. A helmet that is too large may shift during an accident, reducing its effectiveness. Conversely, a helmet that is too small may cause discomfort or fail to provide adequate coverage. Historically, helmet sizing relied heavily on general approximations; however, modern standards emphasize precise measurements to enhance user safety.