I went to the store
I went to the store in Sydney and try it, to make sure it fits well, then the medium size needed to be amended a bit, 4cm dress length. When I make the purchase, I received a friendly email asking me to send my measures, height, hollow to hem, wearing high heels, barefoot, etc and I did.
I received my dress exactly how I wanted, fitting pretty well! Cant wait to wear it, thank you so much!