Heya!
I posted a bit like this the other day, had a look on So Fem etc and I think that you should measure in ml’s. I originally did the rice test and measured 340 in grams so when I read that it should be ml’s I went back and poured the 340grams into a measuring jug and it was about 380ml so not a huge amount of difference in terms of implant size. Maybe you’ll need something like 460cc implants to get close to 400grams?? Hope this helps a bit anyway
xxx