The small size, plush coat and friendly personalities of Mini Rex rabbits make them one of the most popular rabbit breeds in the United States. They are also very popular because they are hypoallergenic.  They were first recognized by the American Rabbit Breeders Association (ARBA) in 1988, and have been very popular with exhibitors ever since. They weigh from 3.5 to 4.5 pounds when fully grown. They have very social personalities and their fur feels like velvet.