1.Cut a piece of paper and wrap it around your finger. Be careful not to wrap it too tight or loose. Aim for a comfortable fit.
2.You can have someone else help you for an accurate measurement.
3.Mark where the paper meets.
4.Measure the distance with a ruler. Make sure to convert measurements to millimeter.

> Measure your fingers towards the end of the day when they’re at their largest.
> Cold temperature can shrink your fingers up to half a size, so make sure they’re warm.
> Alcohol and salt can make your fingers swell, so refrain from measuring them after consumption.