Just in case this helps,
I have about forty 60-70cm BJDs and one 80cm BJD in my house. I have all of the Super Dollfie body types Volks makes (SD, SD13, SD16, SD17 and SDGr) and there are about 25 companies represented in my group. The doll in my avatar is a Volks SD16 girl.
Fitting things to a Volks brand doll is a good idea as they are considered "standard" size so things made for them has a chance of fitting a doll from another brand. But with all of the shapes and sizes being made these days you can't expect to hit a broad cross-section even if your clothing is somewhat adjustable. Girl doll's dimensions can be very different, out of the 10 girl dolls I have none of them are able to share clothing. Really only my 60-65cm boy dolls have an easy time fitting the same things, though some of them are also odd proportions.
Let me know if you have any other questions.
