The external appearance of woolly rhinos is known from mummified individuals from Siberia as well as cave paintings.[3] An adult woolly rhinoceros was typically around 3 to 3.8 metres (10 to 12.5 feet) in length, with an estimated weight of around 2,721-3,175 kg (5,999-7,000 lb).
The woolly rhinoceros could grow to be 2 m (6.6 ft) tall; the body size was thus comparable, or slightly larger than, the extant White rhinoceros. Two horns on the skull were made of keratin, the anterior horn being 61 cm (24 in) in length with a smaller horn between its eyes. It had thick, long fur, small ears, short, thick legs, and a stocky body. Cave paintings suggest a wide dark band between the front and hind legs, but the feature is not universal, and identification of pictured rhinoceroses as woolly rhinoceros is uncertain.
Its shape was known only from prehistoric cave drawings until a completely preserved specimen (missing only the fur and hooves) was discovered in a tar pit in Starunia, Poland. The specimen, an adult female, is now on display in the Polish Academy of Sciences' Museum of Natural History in Krakow. Several frozen specimens have also been found in Siberia, the latest in 2007.