Measure with a Measuring Tape
Wrap a measuring tape around the finger where you intend to wear the ring. Adjust it comfortably, simulating the ideal fit of a ring, and note the circumference measurement.
Then, use the chart below to find your ring size.
Circumference | Brazil Size | US Size
5.0 cm | 10 | 5
5.1 cm | 11 | 5¼
5.2 cm | 12 | 6
5.3 cm | 13 | 6¼
5.4 cm | 14 | 7
5.5 cm | 15 | 7¼
5.6 cm | 16 | 7½
5.7 cm | 17 | 8
5.8 cm | 18 | 8¼
5.9 cm | 19 | 9
6.0 cm | 20 | 9¼
6.1 cm | 21 | 9½
6.2 cm | 22 | 10
6.3 cm | 23 | 10¼
6.4 cm | 24 | 11
6.5 cm | 25 | 11¼
6.6 cm | 26 | 11½
6.7 cm | 27 | 12
6.8 cm | 28 | 12¼
6.9 cm | 29 | 13
7.0 cm | 30 | 13¼
If you already own a ring that fits comfortably, simply measure its inside diameter using a ruler and compare it with the chart below.
Example:
16.1 mm inside diameter = Brazil Size 14 = US Size 7
This method is recommended for traditional round-band rings.
