The model is wearing size S/M.  Model's measurements: height 164 cm, bust 88 cm, waist 62 cm, hips 90 cm.   Dimensions of trousers in size S/M: waist width - 35 cm (flat),  waist width - 67 cm (when stretched),  hip width - 55 cm, waist height - 35 cm, total length - 108 cm.