The beanie listed is my most popular size - 19” adult. The measurement listed is the brim of the hat pre-stretched. Account for approximately 3-4” of stretch per hat.
Unsure of the fit? Take a fabric tape measure or a piece of string and measure around the head including the ears where you wish to wear the beanie. This will determine the circumference of the head and ensure the fit of this beanie.
Please allow slight color variation from monitor to monitor.