There's about a three feet difference in size between the world's tallest and smallest dogs, according to Guinness World Records.

A Great Dane and a Chihuahua, Guinness World Records holders for tallest and shortest dog, became friends during a recent get-together.

Guinness World Records shared video from the historic meeting between the world's tallest living dog -- standing 3 feet, 3 inches tall -- and the world's shortest dog, who stands at 3.59 inches tall.