Gauge: 25/26 sts32/33 rows in 10cm10cm All dimensions in cm. Circular needle 3.5mm.
Yarn: Greennally by Hasegawa Corporation (Silk14% Cotton51% Rayon29% Polyester6%), 290m/100g, 500(600)g
The most important part of the dress is the top one. It is tight around your bust. The lower part is just hanging down. So you should not worry that it is big/wide. It must be freely.