Please use a standing or sitting position, place the soft ruler 0 degrees fixed at the prominent point at the back of the head, and the upper edge of the eyebrow on the forehead. The hat size is manually measured, with a 1-3 cm error. Measure from the prominent point at the back of the head to 1 cm below, and back to the 0 point on the upper edge of the eyebrow on the other side, which is the length of the head circumference. Please tighten moderately.
Warm reminder
Enjoy outdoor activities such as travel, fishing, and sports. Embrace the outdoors and enjoy the fresh sunshine.