The same goes for the dress dummies/dressforms you can buy.
I have this one:
And of course the measurements for when you buy one of these do not always line up with your actual measurements. Just like patterns. Hooray! /sarcasm
So I went to re-adjust mine today after re-measuring my plumpish body.
And I broke mine.
Apparently when you have the hips on one of the smaller sizes, you cannot put the waist on one of the larger sizes. So apple-shaped sewers - stay away from this dressform.