Sini TuuliaLeafing through a Victorian tailoring manual. I love how they're usually very correct and pretty brutal about it: "Loose in back and tight in the front. Diagram 119. Plate 44.
This is a defect frequently met with by cutters who take insufficient measures, &c. Every one will at once agree upon the wide difference there may be in the form of ladies' figures of the same size chest. One lady of say 34 breast will have a well developed chest, and prominent bust ; the other will have no figure at all ; hence it is evident that to cut the same shape garment for both must end in failure."
The same shape garment for both must end in failure! Indeed it does! But what a way to put it. 😆
Anyway, humans are different shape even when one specific measure seems to add up. And this is why you can't find anything that fits even if it's the "right size" for you, they didn't make it your shape!