I bought this at Nishimatsuya, and it's a cute set-up that you wouldn't expect from Nishimatsuya! It's a separate top and bottom, so they're cute worn separately too. The top has gathered detailing around the arms, and it's stretchy, making it easy to put on and take off. Measurements (approximate, laid flat): Top: Total length approx. 29cm Top: Width underarm approx. 24cm Pants: Waist approx. 20cm (elastic)