It is pretty well-known that Marilyn Monroe was a size 12. However, in modern times she could fit into anything between a 4 and a 10.
These gaps in numbers alone demonstrate how confusing and frustrating our sizing system is.
Our sizing system suffers from size inflation, which started as a marketing strategy to make women seem skinnier in order to sell more garments.
This makes the arbitrary numbers on our clothes even more abstract and ambiguous.