Yankee A4 is bigger than Euro A4. Last time I photocopied a load of stuff in NYPL it wouldn't fit into the folders I had. Guess size matters.
Anyway, forgot to mention. If you are sending a manuscript for proofing, double space it. 12pt Arial or Times. It uses up a sh**load of paper
but it's much easier to proofread (trust me, I proofread in my day job, it's a hideous job; we use Plantin Regular 8pt on 8pt
. God my eyes hurt) and make notes/corrections.