strapless bra advice - brand sizing and support

[UntilYourNextHairBrainedScheme]

I have finally, after so many online returns, worked out that I'm a 34FF in Freya brand bras. All well and good but then I bought the same size in another brand and it was tpo small.
I'd like a stapless bra to allow me to wear a couple of dresses I have with very thin straps - just sun dresses, nothing formal, but although I'm not massive I'm not comfortable going braless (also mid 40s).

Does anyone know whether Freya strapless bras are any good (supportive etc)? I see that wonderbra strapless bras are cheaper and I've heard they're good - does anyone know whether wonderbra sizing is similar to Freya bras? Similar to boob or bust sizing?

Watching with interest x

Freya ones are good. I really rate the Wonderbra Ultimate, but I would go a back size up compared to Freya, it's very tight.

Thank you KatharinaRosalie - that's the kind of information I need.

How did you find the cup sizing in the wonder bra? I always found it gave me a savage back roll & happy cups