How big is your middle finger to make a ring?

To determine the size of a ring for your middle finger, you should measure its circumference in millimeters or use a ring sizer. Typically, middle finger sizes range from about 7 to 10 for women and 10 to 12 for men. It's best to measure your finger at the end of the day when it's at its largest, or consult a jeweler for accurate sizing.