Tiling ideas in a smallish bathroom- is 900mm too wide for a single tile?

[Busywithsomething]

We need to re-tile and we don't want to spend a vast amount, sort of around mid-range in terms of pricing. We have a narrow bathroom where I think we need tiles top to bottom on one of the long walls- about 2.5 metres long and probably only up to about 1.2m high for the other walls. slight recess ( past chimney breast) in wall opposite the straight long wall

It's a dingy room somehow despite quite a wide window, which means I'm only really considering pale colours or beige. It's an old house so nothing shiny, or too modern. I'm really struggling to find any that I like.

One that I do like, although a tad more pricey than I wanted to pay is 300mm high by 900mm wide so a very wide rectangle. On the long wall with shower above bath, the 2.5m ish wide, it would only fit two of these tiles plus the cut tiles on each side - does that sound bonkers?

Otherwise can anyone suggest any tiles that might suit please? I've been round Topps Tiles three times now and just come out in a daze.

Thanks in advance

We did something similar recently but in a normal family size bathroom. It was vastly more expensive than anticipated.
Much more wastage - to put a tile in a mid point so it visually looks better, it created a lot of wastage with other tiles down the size.
Old house so walls not level. Putting up one tile in a bowed wall was much more complicated than two smaller ones
Sheer weight. Made it very difficult for our admittedly pint sized tiler to manoeuvre into place, cut out for pipes etc so much more wastage than he liked.

He's done a lot of work for us before and I have no qualms about his competency. Lessons learned all round really. He said he didn't care what we bought and we measured up and costed for the sqm with 10% wastage and used 3 times what we budgeted for in the end. He learned that an enormous tile is bloody difficult to work with in an old house.

Love the finished look but omg £££.

@TreadSoftlyOnMyDreams thanks very much for all your points. Very helpful. I need to think again it seems.

Taking into consideration PP's experience and the fact that your bathroom is smaller, you could still get a similar effect by using tiles of similar proportions but of a smaller scale. 900 x300 seem oversized for a small bathroom and doubt you would be pleased with the look of all those cut tiles. I would ask to borrow some tiles and then try them out in your bathroom to get a better idea of which proportions work best for your space.

I had the same experience as @TreadSoftlyOnMyDreams. Lots of wastage around the edges, and very unforgiving on less than perfectly straight walls.