Bra size. Help!

[Fluftytufty]

I know this has been asked many times but I didn't want to barge into anyone else's thread.
I measured myself yesterday and got 29 under, 36 around. It's the 29 I'm really confused by. Do I go up to 30?

You generally try both. So try 28F, 28FF, 30F and 30E. Generally, people who are very slender with little, erm, padding will get on better with the 30 and those of us with squidgier torsos will get on better with the 28.