I deliberated for a long time between Damier 25 and 30 and ended up getting 30. I'm 5'5" and I think it's the perfect size for me. Keep whichever one you'd be comfortable with!
I am 5'9" and have both a 25 and a 30. I love them both, but I tend to carry the 25 more. I think they both look fine on that height, it is just personal preference whether or not you like a bigger bag.
Regardless of what others like 25..30..whatever, It's about what you prefer. I hate to keep gifts that I'm not fully satisfied with. If ur DH can truly understand that, I'm sure he'll be happy if you're happy.
pics would help...but i think a 30 would be best
i have seen tall women with a 25 and it looks so small
don't be worried about your husband maybe you can tell him you really want to use it alot and need the bigger bag to carry all the things you need during the day. Im sure he would understand
I'm 5'6" and I think the 25 looks perfect on me. I'm about average size. I didn't want a gigantic bag that would be hard to carry around NYC, and the 25 fits everything I ever need plus a change of shoes!!