Product details:

This collar is designed to fit neck sizes 11 - 20-inches and adjusts in height 2.5 - 5-inches. This product offers soft, comfortable, contoured support for pinched nerves or tightness in neck. It is adjustable in both width and height. It is made of breathable foam and covered with a soft, smooth knit material for added comfort. The collar is easy to open and close for proper adjustment. Day or night, this collar is comfortable to use. The collar height adjusts for a more comfortable fit.