Idunno if I'll actually finish this but I loved the sketch too much not to upload it and it shows Kosu at his proper size. He's smaller than most of our feet paws XP. Of course he can be drawn bigger than that this size is what's on his ref :3

Those are meant to be Shizu's paws by the way. I draw them at random sizes but if she were plantigrade her shoesize would be 8 and 1/2. He's 8 inches on his ref.