The present invention relates to a set comprising a makeup product and a cosmetic applicator for applying this product, the applicator comprising a stem and an application member borne by the stem, the latter comprising a flexible portion (14) of wavy shape, of flattened cross section on a major axis, the flexible portion comprising a succession of elementary patterns, the flexible portion (14) having its angular deflection about the major axis limited by elementary patterns coming into mutual abutment.