unable to create a working macro

I've been trying to create what I thought would be a simple macro to resize about 900 shelf tags but for the life of me I can not get this done. (I'm experimenting on just one tag ) The tags are 3.0" x 1.25" in size.  I need to resize all the tags in my folder to be 2.95" x1.2".  I cannot get my recorded macro to work. The directions for making a macro seem to be pretty straight forward....give your macro a name, click the start recording button, do what you need done,, then click the stop button. When I try to run the macro nothing happens.  What am I doing wrong?