Newborn kangaroo joeys are not measured by height, but by length. A newborn baby kangaroo has a length of just 2cm, which is less than an inch. It is without hair, and blind.
It then crawls into its mother's pouch where it remains for several months while it continues its development.
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The height of a newborn kangaroo is about 2 centimetres. Like all marsupial young, they are born very undeveloped: pink, hairless and about the size of a bean.
Newborn joeys cannot jump at all. It is not until the kangaroo is several months old that it can move outside the mother's pouch.