Whats the minimum coop size for a pair of bantam silkie ducks?

[backyardchickenfarmer]

Hello guys, I was wondering whats the smallest size i can go for biuling a bantam silkie duck enclosure. Thanks!

 

[CityChicker]

I think it all depends on the set-up. If you build something that can be moved around, it could probably be pretty small. Likewise, if you use some sort of substrate like sand, you could get by with smaller space than say a dirt floor.