Build and Shoot

What would be the size of one map block if game was real?
I care about this since I am planning to release ~6 mods together, they must use same standartised scale.

I am thinking about 0.7 meters/block, say that eye height is ~1.75 m and player height is ~2 m, and 2.1 meters per 3 blocks, equal to 0.7 meters per one block.
I also choose 0.7 because it is easy to derive, not like 2m / 3 blocks = 0.666.

Another possibility would be 1.92 m per 3 blocks, equal to 0.64 meters per one block.

EDIT:
I just realised that the feared model size limit of 64 blocks applies only to z axis.
So I believe I will switch to 0.64m / block. Then a model, which has scale of 1/64, has one voxel size of 0.64m/64 = 0.01m = 10mm, it kind of eases translation from irl to models.

So we can assume the deuces are males, and I would imagine Western, given the WW1/WW2 background.

https://www.google.co.uk/search?q=average+male+height - This gives us 177cm or 5ft 10in.

A deuce is 3 blocks high, so 177cm / 3 = 59 centimeters.

0.6 metres is correct! However given this is voxels, I think 0.64m is fine.