There are two contenders for the smallest pig in the world; both pig types come from breeders who have been working to miniaturize the Pot Bellied Pig, by breeding different species and favoring certain characteristics. The first kind is from Pennywell Farm in South Devon. These little pigs weigh around 25 kilograms; about one quarter the size of a full grown pot bellied pig.

The next contender for smallest pig in the world comes from Royal Dandies in Oregon and weighs between 9 and 29 kilograms. The Royal Dandie Pig is also the product of several generations of cross breeding to favor small characteristics.

Pygmy Hogs, once thought to be extinct in some regions are starting to make a comeback due to conservationist efforts. These hogs were native to India, Nepal and Bhutan, but are now only found in Assam. They weigh between 6.5 and 12 kilograms. They are Critically Endangered at approximately 150 animals left in the world.