The smallest rabbit breed is the Netherland dwarf, which weighs between 1.75 and 2.5 pounds when fully grown, according to Rabbit Breeds. Individual weights tend to vary, so an exceptionally large Netherland dwarf may weigh more than an exceptionally tiny rabbit of another breed.
Rabbit Breeds describes Netherland dwarf rabbits as having glossy and dense fur that comes in several colors. They have disproportionately large heads; short necks; short, erect ears; and compact, rounded bodies. Some rabbit breeders claim that Netherland dwarf rabbits are more prone to nip people than other breeds, and, therefore, may not make appropriate pets for small children.