I tried this bra because I heard it was very similar to the Freya Deco, which fits me great.  I wasn't sure if this one would fit since it only goes up to a G cup and I typically wear an H or bigger, but it does!  I think the cups are quite generous in size.  For reference: my deco is a 30GG and the cups are a little small, but it doesn't go higher in a 30 band. The 30G in this bra fit the same as my deco in 30GG.

In this bra, I ordered both a 30G and 32G because that's the biggest cup size.  While both fit in the cups, the smaller band works better.  The 32G cup is better fitting in the proper sense, but the 30G gives me amazing cleavage which I love.  I think plunges are a little more forgiving in size compared to most bigger cup bras that are fuller cup and less forgiving in size.