well no, the approximate battle scale is one meter per tile.
Or is it?
For a number of reasons (technical limitations, playability), games present you a more condensed world. Even
Stalker does it, despite having realistic graphics: although the town of Pripet looks the same as the real deal, its buildings are in fact much smaller.
So even though the tile looks to be around one metre (compared to soldier sprites), they could just as well be three metres, just not represented directly for clarity of graphics. But honestly I wouldn't even try to guess at the exact number, the game doesn't need it and it would probably bring more problems in than it would solve.