Usually 2 to 3 inches it really depends on the size of the gerbil. If you have any more questions about gerbils go to my website, www.freewebs.com/gerbils1234
They vary, most gerbils grow to 4-6 inches (10-15 cm) long [not including the tail; up to 12 inches including the tail]. Great Gerbils, the largest gerbils, grow up to 8 inches (20 cm) long [not including tail; up to 16 inches including the tail].
A gerbil is about the same length of its tail.
Gerbils can grow to be about four inches long without the tail. Depending on the tail length, they can grow to be about 6 to 10 inches long.
The average is nine inches, including the tail. Perfect to fit in your hands if you cup them together.
Most gerbils grow to 4-6 inches including the tail].large gerbils grow up to 8 inches not including tail
When full grown they are 7-8 inches long including the tail. By 6 months old they are full grown usually earlier.
Gerbils' tails should be as long as the gerbil itself. If they don't, their balance will be disturbed.
4 inches
A fully grown gerbil can be up to 8 inches long, including the tail, which makes their actual main body about half that length.
Adult Gerbils are usually the size of a white rat, about 6 inches, with another 6 inches of tail.
The average length of an adult Tasmanian devil, including its tail, is 80-90cm long, which equals 31 - 35 inches.
A pig's tail can vary in length depending on the breed and individual pig, but on average they are about 6 to 10 inches long. Some pigs may have shorter or longer tails due to genetics or tail docking practices.