My house is not overly big for the area (small compared to surrounding neighborhoods) but was built in 1979 when lots were larger and houses weren't what we call "McMansions" now. The whole yard, front and back, is 0.42 acres. (I don't know what the metric equivalent to 'acres' is in this context but that's 1699.68 sq meters.) And nicely my lot of roughly rectangular so the front and back yard are kind of the same size.
But yes, I have a pool and a large backyard. To be fair, every second house on this street has a pool, though, and mine is the smallest.
Overhead google earth view:
You can see my neighbors have larger yards... but I have better tree cover.
Edit: if any of you are professionals working in your field for 25+ years, I hope you have a nice place to live also.
Edit 2: and yes, my pool is really green in that picture... must have been spending too much time working on JME those weekends...