grid size for large scale interior

[ssundruci]

hi, found some floor plane online and i want to model it real world scale

for example i have  68 Meter floor plane, with ratio of  1:50

but what should be the settings on the grid?

[damaggio]

Here's a meter grid, you can make it larger if you want, it's always square, there's no ratio option.

It's also explained in the documentation.