Hi Victoria! That was simple. We purposely built the knee wall to have the same finish height as the vanity top, so we would have that almost seamless finish look. Now, in your case it seem like you're done with your project, so you might need to get a contractor to look at it and see if still possible to push your vanity top closer to the the knee wall without compromising your light fixtures and sink center lines. Good luck my friend! ;)

Thank you so much for your reply! I think it's not late for me to make the changes, he just finishing building the partition and the walls are not finished yet. I just don't completely understand what do you mean by "knee wall to have the same finish height as the vanity top"? The hight of the wall should go up to the countertop or below it? My vanity hight is 35" with countertop, the width of the vanity is 80" but with countertop is 83". What should be he hight of the wall do you think? Thank you!

If you want that same look,your knee wall should then be 35" h. Same as your cabinet. The finish height of your countertops and knee wall cap should both be the same as well ( about 36 1/4") please note that your cabinet must be installed right up against the shower knee wall. Instead of a 83" long countertop you will then have a 81.5" w only two sides polished ( front and one side). I hope I was able to clarify it for you!