I had made my only worry whether the envelope at all fit on the iPhone 4S, as in the description was none of that.
But I was first relieved when I saw the sticker on the packaging, on the stand that the Case for iPhone 4 and 4S fits.
After unpacking I have, however, must realize that it is just not for the iPhone 4S, as the Lautlosschieber is half covered. The loud / quiet buttons could also be relatively difficult to operate, but this could be due to the non-matching recess for Lautlosschieber.
It's too bad, because the shell really looks very chic!