If the wall i swonky, you can feather a thickness of drywall compound out from the backsplash onto the wall, tapering it thinner and eventually feathering it to "nothing" the further you get from the backsplash. For small deviations you might need to feather it out 8" or a fofoot'. For larger deviations, you might have to go out several feet. The goal is to essentially flatten the wall. Fill in the "low spots" with mud. Then prime and paint. In the end, the wall should look flat and the backsplash should look like it's set flush with the wall. Or, yes, you could simply caulk the gap and put up with the uneven reveal. And for grins, I'd set a straight edge on the back splash just to make sure it's not warped itself. Oh, the things I've seen...

Thanks both. mvcanada, we were thinking of buying a vanity/sink combo online so not necessarily able to buy extra material for backsplash and counter shelf, though if we go with a basic white it shouldn't be too hard to match, right? I can't decide if I would prefer a shelf that extends from the sink countertop, or one that is separate and between the sink and mirror. Might depend on which vanity we choose (still looking, as evidenced by my other post). But good point on running whatever we have to meet the large mirror. pamal66, can you clarify your last bit about the metal strip or pencil liner? Is that for the end of the backsplash on the edge of the sink so it doesn't feel like it just ends by accident? We did consider tiling the wall with the sink/toilet but we were feeling like the current half wall of tile was making the room feel smaller, and with the layout, we'd have to tile everything or just the tub (because tiling by the sink/toilet plus the tub but not the last wall where the vent is would just feel unfinished). We haven't decided on wall or floor colors yet, though the fixtures and tub tile will probably be a basic white. We love this floor: And these are some of our vanity inspirations: (this last one with a white top instead) One thought I had about the tile border was that if it doesn't match the tub tile, it could match whatever we put in the shower niche, but that's as far as I've gotten in finding an actual tile!

If you’re not worried about the wood counter then I’m honestly getting a wallpaper vibe. Something with a white background and a lot of negative space, maybe a large scale print. Not really busy, but whatever your taste is (floral, geometric, striped) and then look for a simplified version of it. I also like the idea of wide panel woodwork, vertical or horizontal, because I think it would contrast nicely with your tile. You can definitely do a tile backsplash but I think it’s a little more complicated on the vanity wall next to the shower because you have to choose more carefully. Since they are next to each other, there’s the consideration of how much of the wall you do in relationship to the shower, and then consider the other vanity. I think you can be more creative if you opt to do something different altogether. I’m not a huge fan of accent niches but honestly as far as they go it’s a good choice! A white wallpaper with some kind of fineline black print would look great with the tile and the wood. Something about lower tile back splashes right against a full tile wall is a little harder for me. I’m having a hard time with this one in one of my projects and I have found I generally like switching materials altogether instead of breaking up the wall. Also, i love bathrooms with little quirks and I have a feeling whatever mistakes you made you will still love this one in 20 years.

cute bathroom. love the tile. ( let me show you some pictures and how to make that room look better) While I like the idea of that tile, I just don't think doing a small bit of it behind the sink would look the best. They have this pic on Retro Renovation that;s similar to your idea, but it looks better because it's also used as the sink surround. Art deco bathrooms or the 50's baths w/those tiles, were usually done completely around the wall. https://retrorenovation.com/2014/04/01/black-white-tile-bathroom-1930s/ If you wanted to do that tile, I might choose to do that entire wall. You could do a tile wainscot w/the black edging tile (like shown here) at the top. You could do a white or black tile. they're pretty inexpensive. Or, do the whole wall surround like this. (and make sure to do the window trim like this one too) The other option for the wainscot would be a beadboard or a board and batten. leaving the walls plain and void like you have it, doesn't really match the style of the tile. if you can't tile the walls, do the wainscot and the trim around the window: or a board and batten,,,,green above. Beadboard wainscot and ceiling, soft sage walls. either of these would really bring your tile together w/the vanity and accessories. vertical nickel gap panel. do the walls in green if you like. Did you know you could do a stained glass overlay on your windows? I did it with mine. Otherwise, you're just going to get this look: plain walls. which option do you think looks better? another option, do the walls white and paint the trim work a soft green to coordinate w/the tiles But I'd still do the wainscot