Marilyn Monroe was a size 18.
Marilyn Monroe’s body is considered iconic. It has come to represent the ideal female figure, and some even label it as "plus size." However, Monroe’s measurements tell a different story. In fact, they closely resemble the 36-24-36 body shape, which is very commonly accepted today. The evidence is her remaining clothes and the records of her stylists, which confirm that the actress actually wore a size 8.
Monroe’s weight did fluctuate: for instance, during her pregnancy (which, unfortunately, ended in miscarriage). But she was never overweight. Besides, the US clothing size chart at the time differed from today’s measurement tools.