small bust; small breasts
Wasei-eigo from French 'petite' and English 'bust'. Used in fashion and body-type descriptions, often with a neutral or slightly euphemistic tone.
wasei (Japanese coinage from French), from petite · wasei-eigo (Japanese-coined English), from bust
She has a small bust, so she's looking for a smaller-sized bra.
There was a fashion feature for small-busted women in the magazine.
Variant with interpunct; less common but sometimes seen in fashion contexts.
Wasei-eigo combining French 'petite' and English 'bust'. The exact derivation is uncertain, but it likely emerged in Japanese fashion media.