Find a soft cervical collar that will support your head in a comfortable, upright position. The soft collar should be only as tall as your own neck. Make sure the collar reaches from the underside of your jaw to your collar. Apply the collar by keeping your head upright and forward. Do not tilt your head backward, as doing so may aggravate an inflamed nerve. Wrap the soft cervical collar around your neck securely, but not tightly. You should be able to breathe as easily as before applying the collar. Secure the Velcro straps to hold the collar in place.

detail picture:

 Product feature:

The structure of this cervical collar is succinct, it's easy to operate

The size can be adjusted optionally in 4 positions,

Insuring you get the right size quickly

So big spiracle for supervising carotid

 package: