You could fill in the 'short' space with a board of appropriate thickness, glue the Corian to the board and cover the top and front edge of the board with some dimensional moulding like cove mould. Or, depending on how tall the Corian side splashes are, perhaps you could rip some material off the Corian and laminate the strips to the top & front edge (doesn't have to be a solid lamination) and live with a reduced height splash. This would be my preferred approach. Another idea--the side splashes could be used to make the counter longer (edge glued) and use something else for the side splashes or just use the backsplash, omit the sidesplash and caulk where the Corian dies into the wall.

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!

Hello CK- Although we frequently do use a 4-6 inch backsplash made out of matching material to the countertop, we have also used tile in a vertical position as a backsplash for a fresh, modern look. Even if you could purchase an identical 6 inch quartz piece, the vertical tile backsplash will add more texture and dimension for visual interest, or "excitement" as your contractor suggested, in a very neutral space. I attached some pictures of a tile that could be a good consideration for your project and some pictures of backsplashes we recently completed with tile and with a backsplash matching the countertop. This link is to a white tile that is a favorite of ours, called Cloe in white: https://www.bedrosians.com/en/product/detail/cloe-ceramic/?itemNo=DECCLOWHI28G&moq=true&gclid=CjwKCAjw0dKXBhBPEiwA2bmObale6YudyahRloMH3jTIT4_PaoN3OCCOUJyOwMIvAA9uDRoR5VP0ixoCaisQAvD_BwE

The wall will hold a 60inch vanity along with a toilet in the left corner. I am thinking of doing a backsplash with a beautiful decorative tile that goes behind the vanity mirrors up to the ceiling. Since the toilet is also on the wall what would you recommend I put on the wall in that area? I wouldn’t want a decorative going down to the floor behind the toilet.