If you want to know which size High heels shoes you need, you will have to measure your feet. You can have this done in a shoe store, or you can easily do it yourself. If you want to measure the size of your feet yourself, place both feet on a sheet of paper that is larger than your feet and draw and line around your feet. When you have done this, you measure the length of your largest foot.
Measure the length of your foot
Once you have measured the length of your foot, you can easily find a table on the internet with the foot length indicated with the corresponding measurements. Do not only look at the EU size, there are also shoe brands that display the USA or UK size. When your foot actually needs half a size and the shoe you have in mind only uses whole sizes, always round your size upwards.