Ships from Hong Kong. The diameter is 14.5 inches. With super soft velvet + PP cotton material, Let you in the car, office and take a variety of vehicles to be able to rest well, to solve the problem of pain in your neck, protect your cervical health. Creative design make you special. Note: 1.Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. 2.The colors may different from the pictures display, please understand.