My waist is 66, hips 86. The pants barely fit in the waist. It is still wearble but I would prefer size M so it will be comfy to sit all day in the office. For height 161 super long (+10 cm at least). Size S fits like Eu XS. Even with 66 waist you better take M.
I bought it as my prom outfit. It looks amazing! Blazer: M; Trousers: L. My height is 169 cm and I’m going to wear it with high heel shoes. (Chest 94cm, waist 73 cm, hips 96 cm)