Teacup pigs are micro creatures having a tendency to grow rapidly after taking birth. Newborn piggies can be fit into a large tea cup and that’s the reason for referring to them as Teacup Pigs. Teacup is not the name of any breed, but micro sized pigs are called so because they are tiny in size than those hefty farm pigs weighing 1000 pounds. You have to purchase your pet from a trusted breeder to make sure that your choice is right. The piglet can become really large if you do not know about their source.