It's too good to be true. I tested it out, and was very disappointed with what I saw. It's certainly possible to make a (mostly) accurate algorithm, but this one needs work. They only offer up to a UK F cup, even though plenty of people need larger cup sizes. Also, the only listed band sizes are 30-38. Lots of women wear sub-30 bands (or should be wearing them). The "quiz" is also incapable of determining if a band is too big or if a cup is too small, which are two very common problems.
While any online fitting service is bound to be somewhat inaccurate, I am impressed with the services offered on the Butterfly Collection website. A Sophisticated Pair also has good fit advice. I would not recommend the calculator on the Lady Grace website, as it adds 4-5 inches to the underbust measurement to get the band size, which results in an unsupportive bra.
Almaline: Have you looked at Ewa Michalak bras? They makes 24-48 bands (and almost any cup size), though I think you may have to request "unusual" sizes in certain styles.
While any online fitting service is bound to be somewhat inaccurate, I am impressed with the services offered on the Butterfly Collection website. A Sophisticated Pair also has good fit advice. I would not recommend the calculator on the Lady Grace website, as it adds 4-5 inches to the underbust measurement to get the band size, which results in an unsupportive bra.
Almaline: Have you looked at Ewa Michalak bras? They makes 24-48 bands (and almost any cup size), though I think you may have to request "unusual" sizes in certain styles.