[Jim McDougall]

Thank you so much for the elucidation (as always) and for breaking your original notice of not bothering us with exhaustive details. I am always glad when you are encouraged to do further research and share it here with us.
As one not particularly well versed in armor, it is good to have these pertinent (not exhaustive) details applied, and providing much better perspective.

While some of the hypothetical suggestions seem of course, somewhat out of place (i.e. dwarves), it is sometimes just broadening discussion to even remote possibilities for the sake of note. I would point out here that my mention of smaller display item was in concurrence with Victrix' note on miniature harness (=armor) as a possibility. The notion of 'damage' as well as apparent 'mounting' apertures may also lend to this idea as positioning such a piece to receive blows (much as in proving armor) does not seem far fetched.
I agree with the comment on the elements of armor being comprised of components that would better adjust to the wearers 'physique' and moveability. It was mentioned that the bevor (gorget and chin guard) above and tassets below would complete the coverage of the individual with this breast plate central.

I had indeed not seen your recent entries when I mentioned this topic and subject breastplate (avoiding the term cuirass in case of technicality) in the case of an unusually small katar on the ethno forum. I had not realized I had sounded so decisive in my comments which I thought indicated that the possible circumstances shown and discussed remained inconclusive.

As I had been focused on the katar, I simply thought of this discussion and brought it up as an analogy of similar circumstances in weapon size. It was not meant as a conclusive case as evidence of any presentation, and certainly not meant to cause you concern. Mea Culpa.