I only have the one card so not sure if it was originally attached or not. The one I have is the same size as any other normal card. I will say if it was attached, whomever cut it apart did an excellent job. The corners and sides are straight and don't show any signs of cut marks looking at it under the magnifying glass. I'm just not sure how it should be, if you get a chance would you look at the COMC site?
All Items matching: 96 #S1 Brett Favre (comc.com)
It looks just like the Ultra Sensations 1996 Ultra Sensations #39 Brett Favre | Trading Card Database (tcdb.com) but it has S1 instead of the 39.
Thanks again for the help, I haven't been able to find out much about it.
Bama