I'm making a model of an apartment based on blueprints and i'd like to do it to scale but i can't really wrap my head around how it works in maya with the grid units and actual real world meters. Basically i want the whole thing to be 13x9 meters so with the settings to meters do the individual grid squares represent 1 meter or 5 meters, tried looking online but ended up more confused

Can someone enlighten a noob?
Cheers Brian