There are two different height standards for the Nigerian Dwarf goat. The height standard maintained by the American Goat Society and the American Dairy Goat Association requires does to be less than 22.5 inches (57 cm) at the withers, and bucks to be less than 23.5 inches (60 cm) at the withers. The Nigerian Dwarf Goat Association states does should ideally be 17–19 inches (43–48 cm) in height, with a maximum allowed height of 21 inches (53 cm), and bucks should ideally be 19–21 inches (48–53 cm), with a maximum allowed height of 23 inches (58 cm).
The Nigerian Dwarf does give a surprising quantity of milk for its size. Its production ranges from 0.5-4 kg of milk per day (one quart of milk weighs roughly 2 pounds), with an average doe producing about 2.5 pounds of milk per day. Production depends upon genetics, how many times the doe has freshened (given birth), quality and type of feed, and general good management. Since Nigerians breed year-round, it is easy to stagger freshening in a herd for year-round production of milk. Thus, they are ideal milk goats for most families. Their milk has a higher butterfat content than milk from full-sized dairy goats, averaging 6.5% according to the American Dairy Goat Association.