You can math your way to anything. Per the above, if you know the real-world-size of the distance you are traveling on the inside of the mesh and chunk it up to the real-world size of whatever a brick on that texture ends up being, then sure. But I don’t know enough to do that with you. 
Not that I wouldn’t like to know how, but I can only conceptualize.
Mechanically, that seam at the corner, I’d hide that with another mesh, like a block running along the intersection, like trim. Or a pipe, pipework, maybe some some world-aligned moss painted in via vertex-coloring so the seam isn’t even there to begin with.
Sometimes it’s better to go around vs through. 