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.

Sounds like a very stressful situation! If there is absolutely no way the builder will allow you to change things (even if they did, I imagine they would ask you to foot the entire bill of pulling the tiles down and replacing all water proofing in addition to new tiles), I can make a few suggestions for improvement. Firstly I would suggest replacing the tiles above the vanity with a white mosaic, a patterned or a textured feature tile/strip. You could also use this same tile to replace the vertical feature in the shower. There are some beautiful shapes and sizes available to choose from. Secondly I would address the grout situation in this way: Floor - dark colour grout & Walls - Light colour grout. Lastly if it does not prove too difficult or expensive, maybe replace the tiles below the vanity with a plain white tile (could be similar size). Good luck and I am sure once you have a lovely mirror up and some crisp white towels, it will look just wonderful.

You're welcome Jen. I think it was $70 shipping Australia wide. All feature herringbone tiles I'd looked at were so expensive and I found theirs for 65/ metre. I ordered extra and I'll use them for the Landry too.

Sarah Sarah is right. You won't find a perfect match unless you find new old stock for sale on ebay or gumtree - but you have to be lottery lucky. Try moving tiles from under the fridge, or under the dishwasher, or under the bottom shelf of the pantry. However you will probably break about half of them in the removal process. Don't even bother to try and trim different tiles like annb1997 has suggested as there are too many variables with thickness, finish, texture, colour and gloss level. A mismatched tile will be obvious every time you walk into the kitchen and be a permanent annoyance. Best of luck, Dr Retro of Dr Retro House Calls