What is the Lorentz contraction equation for bodies at relativistic speeds?

[zeromodz]

I need an equation to find to what extent bodies stretch or compress reaching relativistic speeds. Thank you:)

 

[Matterwave]

The Lorentz contraction:

$$L'=\frac{1}{\gamma}L$$

Where gamma is the Lorentz factor:

$$\gamma = \frac{1}{\sqrt{1-\frac{v^2}{c^2}}}$$