Female white rhinoceroses are slightly smaller than males and have longer and thinner horns.
White rhinoceroses have two horns of unequal size. The horns are composed of keratin, like true horn, though they lack a bony core and are unattached to the skull, resting on nasal- and frontal-bone pedicels, continually growing.
The recorded length of longer horns is 1,660 millimeters in lenth. The shorter horns can grow up to 550 millimeters in length. Female white rhinoceroses have longer and thinner horns than males.
Females are also slightly smaller than males. White rhinoceroses are one of the largest terrestrial mammals and weigh approximately 1,000 to 3,600 kilograms as adults. The average length of their head and body, not including tail, is 3.35 to 3.77 meters. The average length of tail of white rhinoceroses ranges from 0.57 to 0.77 meters. In addition, white rhinoceros average shoulder height is 1.71 to 2.85 meters, whereas their average girth is between 2.01 and 2.20 meters.