At first I thought that the two new litter may be a little small because of their smaller size relative to the old cat litter - my two cats are rather large and one of the two is strongly built. But this is not so, the cat litter is the right terms of size and according to the business "flies" in terms of volume and not more cat litter around as with the slightly larger litter. It is more the case that the old litter were almost too big for our bathroom. I can only recommend the Karlie cat litter.