Mexican designers show that Trump's proposed $25 million wall would be impossible to build

On the campaign trail, Republican presidential candidate Donald Trump has threatened to build a wall along the Mexico-US border to keep Mexican immigrants (or "bad hombres" as he calls them) out.

But what would Trump's proposed wall look like in reality?

Mexican architects from Estudio 3.14, a Guadalajara-based design firm, imagined a hot pink border that stretches 1,954 miles long, called the "Prison-Wall."

The renderings are meant to show the impracticality of building the wall, designer Norberto Miranda tells Business Insider. He says the border likely wouldn't foster positive relations with Mexico, and the country's rolling mountain ranges would make construction difficult.

As many others have pointed out, the wall would also be expensive, and Mexican President Enrique Peña Nieto said his country will never pay for it. CNBC's Kate Drew said the construction would cost the US government $15 billion to $25 billion. Plus, maintenance and hiring 21,000 agents as border patrol would cost an additional $2.1 billion per year, according to an analysis by Politico. Estudio 3.14 designed the renderings around these estimates.

Here's what Trump's wall could look like.