Well, it says it can fit 5 chickens. I don't speak metric, BUT the measurements it gives are tiny. They must not include the run? maybe there are other opinions out there?
"Fit" is such a loaded term. If you are selling a coop, it tends to mean "physically fit in there", e.g. in terms of providing adequate roost length. That is not necessarily what all chicken owners think of as "sufficient room for those chickens" though. (Although if you live in, like, Hawaii it *may* be)
Ignore mfrs' claims, do the math yourself and decide what you're comfortable with
I would say "it depends". I have 6 standards in a 4ftx4ft hen house, and they are perfectly happy. But, they only roost in there at night and use the nest boxes to lay in. They have a large covered run to play in during the day (around 10 foot by 8 foot). Our climate allows them to be outdoors year round, so they don't need a large hen house.
I would guess it depends on how much time you plan on spending each day cleaning. I myself wouldn't put more than 2 birds in there. But that's a personal opinion. I am lazy and don't want to spend hours upon hours cleaning. Also depends on if they'll be allowed to free range at all. Etc.
But I'm thinking it would work out great for a few rabbits!