This World is Too Small for Me!

From Los Cuatro Fantasticos Number 1:

But we leave the amazing Invisible Girl and return our attention to a men's shop in another part of the city…"I'm sorry, sir, I don't have anything that a man of your size can wear."

"Bah!  It's the same everywhere!  This world is too small for me!"
"Look at the window, in the sky!"

"Those words…'The Fantastic Four'  What do they mean?"
"The time has arrived!"

Notes:
ponerse - to wear 
querer decir - to mean