By Hanan Dervisevic, ABC

Posters campaigning for the "yes" vote at next June 14's initiative launched by the hard-right Swiss People's Party (SVP) to cap the population at 10 million.

On June 14, Switzerland will vote on whether to become the only country in the world to officially cap its population.

With a limit of 10 million people until 2050, the referendum has divided the country and been dubbed by some as a "Swiss Brexit".

Here's what we know.