Not all Miniature Schnauzers are equal.
The True Miniature Schnauzer is 12 to 14 inches at the withers.
The withers on a dog is the highest point of its shoulder blades. It is located behind the base of the dog’s neck. Feel around this area on your dog and locate the top bony point of the shoulder. … You may even be able to identify the withers just by looking at the dog’s body.