Measure the circumference of your pet’s snout at the base and follow the below sizing guide (If you don’t have a tape measure handy use a piece of string and then measure the string with a ruler):
Size Inches Centimeters
Small 6 – 8 15 – 20
Medium 8 – 10 20 – 25
Large 10 – 12 25 -30
X-large 12 -15 30 – 38
