The swedish get a good size, about the same size as a Pekin female, sometimes larger. I think one of my silver Swedish might be mixed because I have two and one is significantly larger than the other and built differently. But maybe it's an age thing too, not sure. But then my two black swedes are bigger I think then the smaller silver Swede and she's got about a year on them so maybe she's just a runt lol. I just want to be sure that I cover all bases when considering whether to get call ducks. I don't want to get them and then realize it's going to be more difficult than I realized or if it came down to needing to rehome them for their safety it's not easy to find a home for ducks around here, especially males.I am not sure how big the swedish ducks get but I think all will be fine since you will only have two like I do.