The Classic gi is really great, but it seems that Kingz’s sizing changes depending on the gi model. I am a woman, size 5’3 (162cm) and fight in feather or light weight, F1 size. The pants were quite big(still wearable when a light weight) and the jacket was good, but not a slim kind of fit.
If you are a proper featherweight and stay around 56kg F1 might be a little too big.