Need help authenticating this Balenciaga City

Jan 4, 2017
Hi ladies! I'm a Balenciaga virgin (and new to this forum).
One of you Balenciaga experts told me I should be careful with Vestiaire Collective (where I tried my luck for the Balenciaga City Giant I want so badly).. Their in-house authenticators aren't as good as they want you to think. So I'm hoping I can rely on your expertise!

It's a plain black Balenciaga City Giant with the big rivets.
Width 38 cm, Height 23 cm, Depth 15 cm (according to the seller on VC)
These are all the pictures I have:

Schermafbeelding 2017-01-05 om 11.08.28.png
Schermafbeelding 2017-01-05 om 11.08.40.png
Schermafbeelding 2017-01-05 om 11.08.50.png
Schermafbeelding 2017-01-05 om 11.09.11.png
Schermafbeelding 2017-01-05 om 11.08.58.png

My question:
  • Is it an authentic Balenciaga City?
  • What about the measurements? Are they right for this type of bag?
  • What do you guys think of the condition? The seller states it as "good condition"?

Thank you soooo much!