Hi Steph, you maybe better re-posting this in Design Dilemma or Photos it might get a little lost here. However, they maybe 4" diamond pattern tiles, they look like individual pieces and you make your own design/layout. :)

Hi they look like they are marble and possibly from Ca Pietra. http://www.capietra.com/shop/stone-walls-floors/jet-set-collection-milan/.  Happy hunting!

If the space is small then I think you should keep to one type of tile for the floors and walls. If you don’t tile one wall make sure you tile up that wall a skirting board height (tricks your eye into thinking the floor is bigger). Don’t worry about tiling behind the wc, you can access the workings of the cistern through the removable flush plate- I had to completely replace the flushing mechanism in one of mine and it was only a 10 minute job despite feeling like it was keyhole surgery! If

That's interesting colourhappy - we did omit the aqua tiles and put just the taupe with blanco (which has some grey tones in the variations) but it looked a little bland which is why we thought the aqua might liven it up but now I'm thinking you are right and they are too cool for the flagstones.