I’ve got my hands on the expansion for Warcraft II, Beyond the Dark Portal. I bought it with the original Warcraft II, of which I already had one in my collection. When I compared the two, I noticed that the copy that I already had was slightly bigger than the other one. Must be another release, probably US or something. They always like their stuff a little bigger.
I decided I would keep the smaller one, because it has the same size as the expansion and most of the other games I have. Now I hope that I can get my hands on part one and that it will have the same dimensions.