Tile trim for 12mm natural stone

[djcdan]

I have slate tiles going in to an ensuite. The thickness of the slates are 12mm. There are many 12.5mm trim options available (it further limits options it because I want matt black finish and metal), but I'm aware that the trim should be a little deeper than the tile, so had been looking for 15mm.

 

My question is, will I get away with a 12.5mm trim for 12mm tile or should I get the idea out of my head?

[nod]

No it’s to narrow