Hi Ellie, I’m a bit bigger than you. I’m 10st 5 but 5ft 8, I’m a standard size 10. I had 430/455 UHP unders 7 weeks ago, which has taken me to a 32FF. I have a tiny waist so they look quite big, but I’m curvy so in proportion. I was an empty 32d before surgery. Results do vary on personal size, but I’d say you’ll end up a fair size with 450. I do have a little bit of boob greed wishing mine were bigger, but realistically if they were I wouldn’t get bras, I struggle as it is to find anything nice! Good luck with it all. X