Fail safe way to measure bra size

[HighlandThing]

I had a baby this year and am now out of nursing bras but boobs are too big for my old underwire bras. I'm not able to get to the shops with Covid so I'm trying to accurately measure my bust myself to order new bras online. I was a 32FF if that's relevant. There are various methods on Google but not sure if they are really accurate. Does anyone know a fail safe way to ascertain cup size / bra size?

Boob or bust.

Forget the old add 4inches thing, we have a wonderful invention called elastic these days:)

booborbust.com/

booborbust.com try this to get an idea of size

Boob or Bust is always recommended on the Style and Beauty board. I've tried it and it was pretty accurate.

Whatever method you use you can't be sure of being 100% accurate.

Different styles vary slightly and suit different body shapes. You might find you are a 32FF in one brand but a 34F or FF fits better in another.

There's a lot of fitting advice on the Bravissimo website and some shops are now offering virtual bra fittings - google gives you a few suppliers.