One collar. Eight months. No monthly reminders.

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Collar size guide

Dogs
Over 18 lbs — large dog collar. Under 18 lbs — small dog collar. For dogs and puppies 7 weeks or older.
Cats
One size for cats and kittens 10 weeks or older.
Fit
Follow the fitting directions on the label in the box, then trim the extra length.

Still unsure? Write to [email protected].