Hang all the full tiles over both walls leading to the corner starting each wall at the middle of the bottom and building up and out course by course.
How to tile a wall outside corner.
This do it yourself video how to install tile edge trims on a shower outside corners shows how to install tile edge trim on a wall and curb outside corne.
She also used glazed edges in this project in her tiled niches.
Cut the final piece of tile on a wet saw to fit the wall so that its edge is flush with the corner.
Use a spirit level or a plumb line to check if the outside corner trim is vertical and adjust it if necessary.
Make sure the corner is framed square.
Set the tiles in thinset mortar spread with a notched trowel putting spacers between them.
Stop each course when a full tile won t fit in the corner by the adjacent wall.
If you re creating a tiled pony wall like justina blakeney s mitering might be a good option for you.
Use a large spirit level to see if the corner is plumb from top to bottom.
Then install the drywall with j trim on the outside edge so it runs past the cement board the thickness of the tile.
Use a notched trowel to spread tile adhesive on one side of the corner.
I do not recommend finishing any tile edge with caulking.
Hold the trowel at 45ยบ to make sure the ridges are large enough to glue the tiles.
Next spread tile adhesive on the wall corner and secure the plastic corner trim making sure it is perfectly plumb.
Start installing the wall tiles from the corner as in the image.
2 install the tiles on the.
You can choose to miter the edges of your tile too.
I think you should tile the whole top and front of the curb.
If you cant find a suitable corner round you could finish the edge of the tile at the front of the curb or finish the front edge corner if you choose to tile the front side of the curb which i recommend with grout.