How we got perfect waists: Scientist say the ideal is a tiny 26.5inches - and (prepare to be jealous!) that's exactly what these women have

Marlene Dietrich, Lauren Bacall and Lily James. What do these actresses all have in common? The ideal waist measurement. 



Never mind perfectly sculpted cheekbones, enviably arched brows or a pert derriere, a recent study has discovered the most attractive female attribute is a cinched-in waist: one that measures a fraction under 26½ in (the equivalent of a size eight). But how does any modern woman over the age of 18 get a waist like that? Five who managed it reveal all...