1200 tile layout?

[ashmarch]

Hi, I’m going to tile inside my shower with 1200 x 1200 tiles, if I sit the first tile on the tray, then the next on top of that, that leaves me with a cut of 240mm going into the ceiling. Would I get away with this or should I start with a 120mm cut at the bottom then again at the top to even it out? (Don’t want too so I don’t have a join near the bottom!

 

[Rae]

Thats a high ceiling ,cut at the top youll never really see it that high