Size is a social construct...
OK so my shoe size can range from a US 7 to a US 8. I try to go for a EU 37.5 when it’s available; when it is not I’d be safe to stick with an EU 38.
My pants waist is simultaneously 24 (Brooks Brothers), 26 (AG Jeans), 27 (Fjällräven), depending on the brand….
My top is easier, I guess. XS or 2. But I’m not so sure about Regular or Petite fit.
My bra… Full bosom measurement (or “bust size”) = 36 inches (93 cm), Band measurement (chest size)= 30 inches (75 cm). The difference is 4, meaning the cup size = D. So my bra size is 30 D.