Measure your dog's head length for exact sizing.  

PUPPY size is based on current head length.
Do not size up for puppies to grow into their Field Guard.  
It will be much too big.  Like putting a man's sweater on a 6 year old.

Watch this helpful video and use the instructions below on how to properly measure your dog's head for the OutFox FieldGuard:

To Measure the Head Length:

1. Use a piece of string, then measure against a ruler.
    The dog isn’t as likely to move his head under a thin string compared to a tape measure.

2. Dog should be looking straight ahead.

3. Measure from the base of the skull, to the end of the nose.

4. Do not follow contour of snout.  
    Pink line is correct way to measure, dashed line is incorrect way