The thuasne neck collar c1 is extremely versatile and well suited to anyone who suffers from neck pain and a variety of neck conditions.   the neck collar supports and holds your neck in a position that forces recovery.  the thuasne ortel classic c1 cervical collar helps stabilise the neck and relieve neck pain. this allows you to get on with your life and perform all the activities that previously felt impossible. it is a flexible neck collar and provides analgesic support for the cervical spine thanks to high-quality foam and precise velcro fitting.  sizing guide the thuasne neck collar classic c1 is available with a height of either 8cm or 10cm so you can choose which one will fit you best according to your neck's length. designed in three different sizes measure the circumference of your neck and check the table below. size        neck circumference (cm) 1             28 - 33cm 2             34 - 39cm 3             40 - 46cm for the collar height measurement is taken from under the chin to the hollow of the trachea choose from either 8cm or 10cm based on this measurement.