How much do piglets weigh when they are born?

pigs are pretty small when they are born, because they are born in litters. litters average in number anywhere from 6 to 16 piglets. my guess is that piglets weigh around a pound each at birth. what i do know from raising pigs for 4-H and fair is that when we take pigs to fair, they are usually in the neighborhood of 150-160 days old and can be expected to weigh in around 220-275 pounds. at 150 days they are not even 6 months old. at this stage, pigs can be expected to gain around 2 pound of weight per day.