Holland is about 7,511 km² in total area, with roughly 5,476 km² of land and 2,035 km² of water. If you meant the Netherlands as a whole, it is much larger at about 41,850 km² total.

Quick distinction

“Holland” usually refers to the two provinces North Holland and South Holland , not the entire country. That’s why people often use “Holland” informally for the Netherlands, even though they are not exactly the same thing.

In one line

  • Holland: about 7,511 km².
  • Netherlands: about 41,850 km².

So, Holland is roughly one-fifth the size of the Netherlands by total area.