According to the National Operating Committee on Standards for Athletic Equipment (NOCSAE), any helmet over 10 years from its initial certification is not eligible for recertification. To comply with this standard, you must replace any helmet used for over 10 years.
Shopping for a baseball helmet is relatively straightforward, as helmet sizing corresponds to hat sizes. If you know your hat size, look for a helmet of the same size. Alternatively, you can measure the circumference of your head to find your helmet size.
