The record-keeping organization marked Tuesday's World Animal Day by certifying 3-year-old Fizz Girl, owned by Tiffani Kjeldergaard of Southern California, as the feline with the shortest stature in the world.
Fizz Girl is a Munchkin Cat, a breed known for its unusually short legs.
Kjeldergaard said she has bred Munchkin Cats for years, but Fizz Girl is by far the shortest.
"Fizzgirl knows that she's short, but she has no problems climbing and getting to the highest places in the house," she said.
The previous record holder, a Himalayan/Siamese mix named Itse Bitse, measured 3.75 inches tall, but later went missing.