Nowadays we have a polite name for clothes sizing: Plus-size.

Back in the 1950s Lane Bryant had different words for larger sizes.

A free catalog of clothes for girls who are "too chubby to fit into regular sizes".

The size of this womans waist is... well... not really what I would call stout. The reason for her smile is because she is wearing a "Gay Percale Frock".

From Lulu's Vintage and Mom's Basement.