I looked it up, the coop is about 6 sq ft. The run is a little over 13 sq ft, but only if you count the space underneath the coop. It would, be just enough for 1 duck without expanding.
I have my ducks in a run that should be enough space for 14 ducks (16'×9'), but I feel it is not enough for my 4. Their house takes up 16 sq ft, then their pool and other water sources, plus the stumps I put in - all of these additions take up space.
I also let them out into my yard, but only when I have time. So, they were out in the yard 4 days ago due to my schedule. Life sometimes overrules our best intentions.
The more space the better - especially for ducks.