Micro pigs, also called teacup pigs and mini pigs, weigh 40 to 100 pounds at maturity. Some breeders claim the animals mature at much less than 40 pounds, but the only way to produce a pig that small is to subject him to severe food restriction and stunt his growth.
A micro pig takes three to four years to reach his adult size. A full-grown micro pig is around the size of a large dog, standing 16 to 22 inches high. They can live for 15 to 20 years. Micro pigs are one of the many different breeds of miniature pigs. Some of the more common breeds include the Juliana, Sinclair, Yucatan and Vietnamese potbellied miniature pigs.