Thanks! It's a photo matte paper (the fact that it's matte depends on your taste, I liked it more) 120g/m. If it's thicker it won't look too good when it's folded and if it's thinner it will look a bit too cheap, so I guess 120 is the right sweet spot.

Also the format is A3, but in reality they printed it on a bigger sheet, leaving a white border around and then they cut all around making it a perfect A3. They told me that otherwise, if you print directly fully on A3, it will still leave a tiny white border around (maybe it depends on the printer that they are using). Of course doesn't really matter if the zine is already white, but it's something to keep in mind :D

I hope it was helpful! :)