raven pearl thanks for clearing that up.
You will need to think about colour coordinating with your wife.
Go to some fashionable boutiques and try a variety of clothes on. Take some photos discreetly. They often won't let you do this so you might have to take the photos in the change room. Note the material. Your body shape has to be taken into account and you won't get the overall picture of what looks sauve on you if you can't see it on yourself. Also sit down with the outfit on.
The Wedding outfit you are going to wear is charming and I agree with your fiancée, you will look like a prince.
From a females perspective, she will remember how you looked on this special day forever. It is a lovely gesture, all the thought you are putting into it.