I am UK size 8, and height 162cm
I bought the M size and it fits really well! The bodice was slightly too big so I had to take it in a little. The quality of the costume is wonderful! The details and colour is great!
The accessories however are a little delicate. The stars you have to attach are fine, but the vision is very delicate and breaks easily.
Also the leg accessory is poorly designed and unusable! It's too heavy and doesn't stay in place. It's not worth using because you might rip the tights. I recommend making your own leg accessory if you can or just leaving it!
All in all, I do recommend this cosplay! Be sure to check your measurements and when in doubt, size up because you can alwaya tailor it down but you can't make something too small any bigger!