The photo is to feature bench top and table by Timber Revival. Maybe contact them (Website, Facebook or on Houzz) to find out about tiles in the picture? They may be able to tell you, or find out from one of their clients. They really are beautiful tiles.

Have you already sourced your tiles? I would expect most tile stores could help you find the edging tiles which I think are typically termed 'pencil' tiles for the style you have shown. We used bevelled subway tiles in our DIY ensuite. In hindsight we would have aimed to finish the brick pattern with 1/3 and 2/3 sized tiles (like in your pic 1) rather than full and 1/2 (pic2 and 3) to give a more even edge thickness/profile... Might not suit and we didn't use capping tile (I lost that arguement!) so it is probably more obvious in our bathroom, but just something you might like to consider.

Before replacing your curtains as this can be quite expensive for such a large window, if they are in good condition, add a band of extra fabric to the bottom in what ever suits you, your existing curtain track can then be moved up to the ceiling for good looking full length curtains without the large round eyelets, could save you a lot of money, I would look at replacing/removing the sheers cheers

The closest I have found currently is below.....where the arcs and straight line can be laid in any orientation and line up to make a continous, but random pattern. The difference is that the tiles I am searching for are encaustic not porcelain, the back ground is coloured not white and the “lines” are double lines made up of more than one colour. They are definitely not bespoke.