I am trying to design my invite through mygatsby. I like the idea of doing the poket for the invite and rsvp card but why order the pocket through them, if I can get a good deal on some from a different website. Question is: What size pocket would I use for a 5.50" by 7.50" invite? It confused me on the website because it would show a 6" x 9" pocket invitation yet say the card size was 5.25" x 7.25." Any help would be welcomed. Also, what's a good estimate for invites? I am a new bride-to-be and have no clue!

help!