This varies according to the different species.
Red Kangaroos are the largest of the marsupials. The Red Kangaroo averages 1.6 metres tall. Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 metres (6.6 ft).
The smallest known member of the very wide-ranging kangaroo family is the Musky Rat-kangaroo, which is about 23cm long. Various other members of the kangaroo family - of which there are over 60 - range in size between those two.
Similarly, there is no "average" weight for a kangaroo. The Red Kangaroo can weigh from 18kg (39 lb) up to 90 kilograms (198 lb) for very large specimens. The male is heavier, and tends to weigh an average of 65 kg (143 lb).
Wallabies come in various sizes, and weigh between 2kg and 20kg (4.4 lb and 44 lb). Pademelons and rat-kangaroos including the tiny musky-rat kangaroo are all classifications within the general term known as "kangaroo", and they are all much smaller.
HERE IS THE SIZE OF A KANGAROO'S BRAIN:approx Kangaroo brain length=5cmapprox brain weight=56g
The length of a kangaroo's small intestine is moderate in length compared to other mammals the length varies depends on the size of the kangaroo.
The average birth weight of a kangaroo is a mere half a gram. Kangaroos are marsupials and, like all marsupials, are born extremely tiny and undeveloped. They are about 2cm in length when first born.
There is a very wide variety of tail length for kangaroos, given that there are over 60 species.The largest species of kangaroo, the Red kangaroo, has an estimated tail length of between 88 and 106cm. This is the equivalent of 34-42 inches (less than four feet).The smallest species of kangaroo, the Musky rat kangaroo, has an estimated tail length of 14 cm. This species has a head-and-body length of just 23 cm.
Quokkas are small members of the kangaroo family. They have a head to body length of between 41 cm and 54 cm, with a tail length of 25 - 31 cm. Their weight range is 2.5 to 4.2 kg.
The Huon Tree kangaroo is also known as Matschie's Tree kangaroo. Its body length ranges between 50 and 80 cm, and it has a long tail. Females average 7.5 kg in weight, and are heavier than the males, which average 6 kg.
The smallest rat-kangaroo is the Musky rat-kangaroo, which measures from 15 - 27 cm in length.
A newborn kangaroo, or joey, is about the size of a bean, that is, about 10 - 12mm.
This depends entirely upon the species of kangaroo. The largest of the kangaroos, the Red kangaroo, can have feet up to 45cm or 18 inches in length. The smallest of the kangaroos, the musky rat kangaroo, has hind feet of just a few centimetres in length.
A newborn baby kangaroo, known as a joey, is less than 2 cm in length.
The smallest kangaroo is the musky rat-kangaroo, with an average length of 23 centimetres. The musky rat kangaroo lives in the dampest parts of the tropical rainforests in north Queensland.
The Musky Rat Kangaroo's average body size is about 23cm (ranging from 15 to 30 cm), and its head to tail length averages 30-43 cm. The weight, which is similar for both males and females, ranges between 337 and 680 grams.