Size, shape, and other properties

NB The word стан is used only with those adjectives that refer to positive properties of the person's figure.
тонкий стан a slender waist
длинный стан a long waist
стройный стан a shapely waist
изящный стан an elegant waist
гибкий стан a lithe waist
Николай Петрович представил его Базарову: Павел Петрович слегка наклонил свой гибкий стан и слегка улыбнулся... [И. Тургенев, Отцы и дети] Nikolai Petrovich introduced him to Bazarov: Pavel Petrovich inclined his lithe torso slightly, and gave a small smile... [I. Turgenev, Fathers and Sons]