Grout lines for same size tiles on wall and floor

[Steve_Bcs]

hi
Quick question ..
I’m tiling an ensuite with 600x300 porcelain . Using a darker version of the wall tile on the floor. Given floor & wall tiles are the same size, I was thinking about 3mm grout lines throughout to keep a consistant look. What is the recommended / generally accepted method. The room is 1.9m x 1.6m . Also, portrait or horizontal & if horizontal, brick bond ? Tia

 

[Andy Allen]

As your using different batches of tiles you may find a slight difference in size.
However I would go 2 to 3 mm joint and landscape...

 

[Steve_Bcs]

Thanks Andy!