Ring size matching.

You need a ring size correspondence table to determine the size of your wedding rings whether you are in Russia, Europe or the USA. There is a clear mathematical relationship between the Russian scale and the pan-European scale for matching ring sizes. In Russia, the size of a wedding ring is the inner diameter of the ring. European size is the length of the inner circumference. From the mathematics course L=3.14D, i.e. Russian size must be multiplied by the number PI (3.14) to get European size, and divide European by 3.14 to get Russian. With American, English and Japanese sizes everything is much more complicated:

• Russian size = (English size x 0.4) + 11.50 .... where A=1, B=2, C=3, D=4..... Z=26, etc.
• Russian size = (US size x 0.83) + 11.50
• Russian size = (Japanese size / 3) + 12.67

Regional European ring sizes have been used less and less lately. Almost any European store will tell you the size - circumference in mm.

Ring size correspondence table