luluaugust said exactly what I was thinking. I have only been a MOG, just the once, and I had no idea what to wear. It was made all the more difficult because I had surgery not long before the event, which left me unable to drive, unable to walk very far, and unable to go anywhere without my DH helping me - and he was working some godawful hours at the time. I eventually managed to get out with only 3 weeks to go and ended up with a floaty skirt, top and jacket, complete with matchy matchy shoes, hat and bag. Needless to say, all worn the once and then stashed away. Thing is, I always dress in very casual clothes - even when I was working it was smart casual trousers, T's and cardigans. I could hardly go to my son's wedding dressed like that, and I don't know how to buy anything else 
72 year old 5 year health check

