Measure your dog's neck circumference at the base of the neck/shoulders to determine the appropriate sizing, remembering to allow a finger space in between your dog and the harness
Note: This measurement is vital in determining the correct size harness for your dog
*Maximum girth measurement is at the deepest point of the circumference of the girth
** Neck measurement is at the lowest point of the neck where the neck meets the shoulders
If unsure, size down as the harnesses are sized big, based on manufacturer measurements
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