A lot of "professional fitters" are just salespeople who were made to watch a 15-minute training video from corporate - and the resulting measurements are about

A lot of "professional fitters" are just salespeople who were made to watch a 15-minute training video from corporate - and the resulting measurements are about as good as one would expect. They still try to do a decent job and will try to get the customer into something which isn't terrible, but often the stores carry a very restricted size range so the product the customer needs is not something the store has. A commonly seen trick is to just randomly add 3-4 inches to the band size, which moves a lot of women into the 32/34/36 band range. If you want to get a good fitting you have to go to small boutique shops - easily identified by them carrying brands like Curvy Kate, Ewa Michalak, Freya, and Cleo. Going to a store like Victoria's Secret and asking for a 28J is just going to make the poor salesperson's head explode. As to 3D scanning: Hell No. There's no way you are getting women to voluntarily have detailed images of their breasts taken by random store people, no matter how much you promise that it is "totally safe and privacy-conscious".