I am using Word 2007 running under Windows 10.
Although I have downloaded and tried to use templates from various manufacturers, they all have a similar problem in that there seems to be an extra blank line inserted between each vertical business card on a sheet resulting in only a few of the ten cards on a sheet being useable.
I did find a similar thread - and apparent resolution - for this but that was for use with a later Word version and the suggested settings don't appear on my version.