SFR Yugoslavia P-81 varieties

Regarding the banknotes of SFR Yugoslavia issued from 1968 to 1986, I am aware of varieties in dates, signatures, baroque/sanserif and 6-digit/7-digit serial numbers. I do not have much literature to check myself, is it possible that there are varieties of different sizes? Or, is it possible for a banknote to shrink this much because of heavy usage?

P-81a, P-81?, P-81b 

Note, there is no difference in height of the design.

The substrate itself can shrink (or expand) depending on what it went through as well as every crease pulling the note together. But it looks quite substantial indeed so I wouldn't say that it is impossible that there is a different plate size.

I think the best way to answer this is to scan the “small” note and the larger note then overlay the signatures from the two scans. If the signatures overlap exactly, it isn't a shrinkage of the note.