How can my bag be no size, code NSZ?
It is clearly part of a line that has multiple sizes.
I believe that refers to RTW only. The size of the bag is part of the code of numbers on the tag. A jumbo classic In caviar has its own set of code numbers as does the m/l, then there is another code for color.
Here is a link to explain it all:
All codes are explained here: https://forum.purseblog.com/threads/style-codes-and-dimensions-of-the-timeless-classics.485001/
This also includes hardware codes. Hope this helps