2022 California Standards for Accessible Design Guide (effective January 1, 2023)

11B-703.7.2.6.2 Women’s toilet and bathing facilities.

A circle, ¼ inch (6.4 mm) thick and 12 inches (305 mm) in diameter, shall be located at entrances to women’s toilet and bathing facilities. The circle symbol shall contrast with the door, either light on a dark background or dark on a light background.

Exception: Within secure perimeter of detention and correctional facilities, geometric symbols shall not be required to be ¼ inch (6.4 mm) thick.