Mosaic install

Hi all,

I have ordered 2 sheets of stone mosaic tiles, I want to create a sink splashback in our cloakroom w.c.

Due to it needing a quick spruce and trying to keep costs down, I’ve bought everything necessary for the job to do myself however, I’m so confused for which trim I need to use?

See pic attached this is the trim I need in brass if anyone can tell me what I need to search please, not sure if the trim needs a certain lip 😅the stone mosaics are 1cm thick apparently so I would like them to sit flush to the trim.

P.s - I’m hoping I’ve used the right lingo 😂

Thanks in advance x