The shoe size converter on this site is meant to make it easier for you as there are several shoe-size systems used worldwide. The alternatives are many as the footwear industry has expanded enormously over the last century, which is great as this means numerous possibilities and variations regarding the fashion of the shoe. To get your specific shoe size just select your size in one category in the shoe size converter, and the others will automatically change to match.
Also: note that Russian shoe sizes and Mexican shoe sizes won't show a matching result to most of the shoe sizes in the other systems. This is because the shoe size systems used in these countries are quite fallible and inadequate.
OBSERVE: There exists many discrepancies between the different manufactures and sizing systems. If you have a perfect fit with a Nike shoe in size 8 it doesn't necessarily means that a Reebok shoe in the same size will fit.