Measure your neck size. Then, add 2 to 4 inches (5 to 10 cm) to your neck measurement to calculate your minimum recommended chain length.

Wrap string around the base of your partner's finger (where a ring would typically sit) and use the marker to note on the string where the two ends meet. Unwrap the string, and use a ruler to measure the distance between the two marks. You can then use this measurement to find the ring size on a chart.

Using a soft measuring tape, like one you'd use for sewing, is ideal. Wrap the measuring tape snugly around the widest part of your wrist. Note the number on the measuring tape, and add a half inch to determine the right bracelet or anklet size.