Wax seal stamp initials???

I vote R & M

I think it depends on A) how formal your invitations are; and B) how you plan to use the seal in the future.

I personally would use the last initial, since I like the level of formality, and would get more use from it for special occasions. Do you know how large a seal the one with two letters will make? I'd also worry about it being a little large or the letters looking squished.

I'm a sucker for practicality. Seems that "H" could possibly be more useful in the future. I'd go with "H"

H!

Thinking long-term, I vote "H"

I would vote H honestly

H, definitely. It'll be useful for years to come - anniversaries, vow renewal, baby shower (if you plan on kiddos), etc.

H

Just be aware, an acquaintance sealed her envelopes with a wax seal and and the envelopes were ripped apart by the post office.

H