Sizing can vary between labels and styles, my recommendation is to check the description of each item. I personally try on each item and gives feedback on fit and feel.
I am 163cm tall. I wear a size 12 top and size 14 bottom. I will generally wear a size 12 in dresses, flowy skirts and tops, and a 14 in jeans, fitted pants and slim fit skirts. I wear a 14F bra.
I try to only stock labels that are true to size, but will note if the sizing is off.
Please message me if you have any questions!