The notebook (A6) would always bend when I tried to bring it with me unless I put it in my bag, which is tedious to bring out in short notice
The notebook (A6) would always bend when I tried to bring it with me unless I put it in my bag, which is tedious to bring out in short notice
OP wrote “A6” so the thing in question is the size of a postcard and OP might be European.
ISO paper sizes are used pretty much everywhere except the US, it’s not exclusively a European thing. It’s like the metric system, if someone’s using sensible standardised units they can be from anywhere and if they’re using weirdly arbitrary units they’re probably US.