When you can't go out you go up. Slender towers have risen across land-poor cities such as New York and Hong Kong, where land is at an absolute premium. 

And while architects in Sydney and Melbourne have pitched ideas for the bombastic skinny skyscrapers, few have managed to get one over the line.

In this The Urban Developer Plus feature, we take a look at some of the skinny towers completed and planned for our cities and ask: does this design trend actually stack up in Australian cities?