I know it's been a while since the wedding but I would love to hear how the wedding went? Do you have any pictures you could share? I bet you looked amazing. You look just beautiful in the pictures you provided.
I also agree go & make her day happy. Just be yourself. So what if you are 6 foot or have a size 12. You deserve to share her day in no matter what way she wants you there. Remember this it is your time to shine for the bride. People are gonna talk if not about you than about something they didn't care for at the event. Shine on my friend Shine on.