Pet Collar Folding Neck Circumference Measurement

When purchasing a collar, you usually see a logo on the neck circumference that says neck circumference x cm~x cm. Usually, the first number represents the length of the dog's jaw that runs parallel to the neck, and the second number represents the length of the dog's jaw that runs parallel to the neck and back.
1.5cm collar: neck circumference 26-33cm, suitable for small dogs
2.0cm collar: neck circumference 30-39cm, suitable for medium-sized dogs
2.5cm collar: neck circumference 37-46cm, suitable for large dogs