Tak, Max
Thank you for your words. Naturally - I wear the same chain-maille and guarantee the quality + you always have repair stuff for your brynja.
about your question:
can't imagine what such piece 45x15 cm can hide&save really

(
look here
it's me - you know
my head is 61 cm around
helmet is 71-74
my piece of brynja is 85 cm wide & 35 long with two long narrow "ears"

becouse it must be free on helmet, your neck and shoulders? not tout.. understand?
45x15 has no sense.
it will cost 200 zlotych, 43-45 euro
(I mean small rings 8 mm & 9 mm)
I can advise 65x25 cm as minimum
it will cost 300 zlotych, 60-65 euro
(the same small rings 8 mm & 9 mm)