Thank you all, still undersided- I am only 5.4 so I hope it will be past my knee... I guess the problem is I don't want to stand out!! 
Some really lovely suggestions there, thank you!
It just an afternoon informal wedding and I am imagining my mums vintage pearls wrapped round wrist. Pale pink and cream tea paper rose bouquet that type of thing
I am brunette, boob length hair with a loose wave.. Standard size 12.
I think I might order and have a try on, it's so hard living in a rural place, no good shops!!!