Because of my new UAG Cobalt Case, which made my Surface Pro 4 more bulky, I had to go back to the shop and change the pouch for the second time. Lol. I received a final exchange warning. So this case will have to be the one.
It seems slightly big on one side but at least I can put my Surface Pro 4 in it easily. The previous 11.6" pouch was too small. It was fine without the UAG case.
Anyway, I changed to a case which matched the color of my UAG Cobalt Case and the keyboard cover. The case is water proof so when I carry it to a business meeting on a rainy day, it should not be a problem. It also feels comfortable to hold.