StarShip generation 2 system

The StarShip generation 2 system proposed by Elon Musk is to have an 18 meter diameter.

This is currently very much a work in progress by spaceX and is so far just a paper rocket (just an idea written on paper and no real hardware yet exists)

Elon Musk: "Next Gen" SpaceX Starship Could Be Twice As Big!

The proposed 18 meter diameter is is a vast increase

F9 Starship and Generation 2 diameters compared

lon Musk: SpaceX Starship Version 2 Will Be 18 Meters