Goggle Size: Medium
Head Circumference: 15 inches
Muzzle Circumference: 9.5 inches
Weight: 30 pounds
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Measure the circumference of your dog's muzzle where you expect the goggle to land on their nose - usually around the back of their mouth.
Measure the head circumference where you expect the goggle to land on the forehead - typically an inch or so behind the eyes.