For those familiar with DIN paper sizes, that going from A2 (60cm x 42cm) to almost A4 (30cm x 21cm). That's a large reduction. Do they mention weight differen

For those familiar with DIN paper sizes, that going from A2 (60cm x 42cm) to almost A4 (30cm x 21cm). That's a large reduction. Do they mention weight difference anywhere? (couldn't find it in the article)