It depends on what font you are using. I just played around with it until I found fonts and sizes that I liked. I also made our names bigger and in a different font from the rest of the text so that it stood out. Same thing for "R.S.V.P."--that was in a different font from the text, etc.
It looks like I used Papryus in 13 font and Edwardian Script 26 for our names. But this was just my draft and then the Etsy seller I used actually printed them. I used Edwardian Script for my RSVP with the title in 28 pt and the text in 18 pt. But again, this was just my draft.
Yeah, it really depends on the font that you're using because 12 point in some fonts is tiny, but very readable in others. I printed my own invites and just used several test pages. If you're not printing your own, maybe cut paper the size they will be and print out what you're thinking to see how it looks. It was hard to judge on the screen.
Re: font size?
It depends on what font you are using. I just played around with it until I found fonts and sizes that I liked. I also made our names bigger and in a different font from the rest of the text so that it stood out. Same thing for "R.S.V.P."--that was in a different font from the text, etc.
With All the Trimmings
With All the Trimmings
I have seen them all different ways....