In different countries the different shoe-size systems are used:
All systems are based on the measure of foot length, and the sizes are based on the length of the shoe sole.
The sizes for R-Class Pointe shoes are marked in European (Paris point) system.
For the new RC Collection of Pointe-shoes launched in 2018, we use the Russian (metric) system.
This system is convenient as it facilitates the process of choosing the Pointe shoes – the real measure of the foot almost corresponds to the size of the Pointe shoes.
There are no common standards for size measures.
The ballet shoes from different manufactures with the same labelling might be different in length.
Only the fitting let's choose the most comfortable shoe size.