I got the "Ready for Visa" email earlier this week (whoo hoo!) and I'm preparing to send my photos in for the CoPR. I'm not sending my passport because I'm not from a country that requires a visa. Silly question... What size return envelope should I send in the package? Can you use a regular envelope (so they have to fold the CoPR) or should I send a full-sized A4/Letter envelope? Thanks!