See this Chart!
You can measure the size of your ring by either using a thin string or perhaps a small piece of paper. Take one of the measurement tools and wrap it around the base of your finger till it becomes a complete circle. Make a mark on the measurement tool with a pen or marker where the string or paper first overlaps. Then line that up with a ruler and take down its length in millimetres. The chart mentioned below, will be helpful for you to measure the size of your ring. To measure extra width you can add another size to accommodate.
Take a thin string or perhaps a small piece of paper. Wrap it around the base of your finger. Make a mark where the string or paper first overlaps.
Measure the length with a ruler and take down its length in millimetres. Determine the size of your ring using the chart given below.