This is the 978th most frequent Dutch word.
qua
"In terms of" or "regarding."
Here, 'qua' is used to express a perspective or aspect being considered, specifically 'quality'.
Qua kwaliteit is dit product uitstekend.
In terms of quality, this product is excellent.
The usage of 'qua' here is to discuss the aspect of 'size'.
Qua grootte past deze tafel perfect in de kamer.
Regarding size, this table fits perfectly in the room.
'Qua' in this sentence introduces the aspect of 'taste' being emphasized.