A C-collar is a CID (Cervical Immobilization Device). Best bet...if you do NOT know how to use it....don't.

There are many types of collars..... to small or large doesn't matter.....they would both be ineffective. C-collars are also just a part of the 'immobilization'. Alone....they may help- some - but they are not the end all....holding in line stabilization is best..as well as keeping them calm and still.

The collar is applied and the patient is placed onto the LSB (long spine board) and HID's (head immobilization device) are placed. The patient is then strapped (there are many configurations of strapping) to the LSB. It is time consuming and involved.