SpaceX 18m Starship vs 12m Starship (ITS) vs 9m Starship

Three sizes of SpaceX's Starship side by side by Scottish photographer & designer Dale Rutherford:

• 18m diameter Starship hinted by Elon Musk as the possible next generation Starship (in artist's vision it's not supposed to land on planets so no fins and legs);
• 12m diameter Starship version (ITS) presented in 2016;
• 9m diameter current Starship design.