Here are the guidelines I got long ago when dinosaurs still roamed & I was young:
Measure shoulders first.
Hip measurement should be at least 1″ smaller than shoulder measurement.
Waist should be about 12″ smaller than hip measurement.
Breast measurement should be between 10″-12″ larger than waist measurement.
Can’t remember what it was for thighs, arms, calves, or neck, probably out there on the net somewhere.
This stuff is really up to each individual, and from what I’ve seen there are WAY too many busybodies criticizing ladies (of all ages) for being too fat, too thin, not adequately concerned as to how they look, overly concerned with how they look…
My .02: the busybodies can always cut their worries in half by minding their own – such as it is. Everyone else: just go by whatever you – and you alone – agree is right for you. Take care y’all.