Size 710–2 has a collar height of 8 cm and is intended for children, but height alone does not guarantee a correct fit. The collar has to match the child's neck proportions: at the back, the top edge should sit just below the base of the skull and the bottom edge should rest on the shoulders without digging in; at the front, the chin should settle into the support without being pushed upward or left to drop. A collar that is too low gives too little hold, while one that is too high presses into the jaw, collarbone, or back of the head and feels awkward, so the child will resist wearing it.
Do a trial fitting before the first full use. Place the collar around the neck, settle the chin into the front support, and fasten the closure so it is snug but not tight. Then check the following points:
- The collar stays level around the neck and does not ride up when the child turns the head.
- The chin rests in the support while the jaw is not pressed upward.
- You can slide one finger between the collar and the skin without forcing it.
- After a few minutes of wear, there are no red marks, pinching, or complaints of discomfort.
If the collar cannot be adjusted to sit level and stable, or if your child is between sizes, ask a specialist or the seller for guidance on this model before regular use. A collar that fits incorrectly does not just feel wrong — it also cannot hold the neck in a steadier position, which is the whole point of this product.