Back length(green line) To do this, measure the length of the back line between the neck and the base of the tail using a flexible tape measure. A good indication of the base of the neck is the bottom edge of the collar . The dog should stand in an upright position when measuring.
Chest circumference(orange line) To determine the chest circumference, measure the circumference of your dog's chest with a tape measurewidest or highest point .
Neck circumference (purple line) To measure the correct neck circumference, place a measuring tape around your dog at exactly the point shown. Two fingers should easily fit between the measuring tape and your dog's neck. Don't measure too tightly.
