Are US and UK ring sizes the same?
The US system of ring sizes goes smaller than the UK, covering sizes all the way down to 31.33mm in circumference. However, the UK system covers larger sizes at the opposite end of the scale.
What is a US size 7 ring in the UK?
Ring Size Conversion Chart

Ring Diameter (MM) | USA/Canada | United Kingdom |
---|---|---|
16.5 mm. | 6 | M |
16.9 mm. | 6½ | N |
17.3 mm. | 7 | O |
17.7 mm. | 7½ | P |
What size is my finger for a ring us?
Measure your ring size with these steps: Wrap string or paper around the base of your finger. Mark the point where the ends meet with a pen. Measure the string or paper with a ruler (mm). Pick the closest measurement on the ring size chart to find your ring size.
What is a size 5 ring in UK?
International Ring Size Conversion Chart Table
Inside Diameter | US | UK |
---|---|---|
15 mm | 4 | H |
15.3 mm | 4.5 | I |
15.6 mm | 5 | J |
16.2 mm | 5.5 | K |
How do I know my ring size UK?
How to measure ring size

- Decide which finger the ring will be worn on and grab a length of string, a felt tip pen and a ruler.
- Take the string and wrap it around the base of your finger.
- Using the pen, make a mark where the string crosses over.
- Use the ruler to measure the marked length of string in mm.
What ring size is 6cm?
7
Use the ring size chart below to find your fit:
Circumference (cm) | Ring Size |
---|---|
6 cm | 7 |
6.5 cm | 8 |
7 cm | 9 |
7.5 cm | 10 |
What is US ring size 8 in UK?
UK TO US RING SIZE CONVERSION CHART
UK SIZE | APPROX US SIZE | APPROX EU SIZE |
---|---|---|
N | 7 | 54 |
O | 7 1/2 | 55 1/4 |
P | 8 | 56 1/4 |
Q | 8 1/2 | 57 1/2 |
How do I work out my ring size UK?
Find a piece of string or strip of paper no wider than 1.4 cm (1/2 inch). Wrap it around the base of the appropriate finger. Use a pen to mark the point on the string/paper where it overlaps, forming a complete circle. With a ruler, measure the length from the starting end of the string/paper to the pen mark.
Is a 5.5 ring size small?
The vast majority of engagement rings will be in the range of 5.5 – 6.5. Of course it’s not uncommon to be smaller than a 5.5 or larger than a 6.5, but almost all engagement ring orders in the US fall in this tight range.
What ring size is 5.5 cm UK?
Ring Size Chart
Ring Size | Inside Circumference (Inches) | Inside Circumference (Centimeters) |
---|---|---|
5 | 1.94″ | 4.9 cm |
5.5 | 1.99″ | 5.05 cm |
6 | 2.04″ | 5.18 cm |
6.5 | 2.09″ | 5.30 cm |
What are UK ring sizes in mm?
(On a phone? Best viewed in landscape)
Inside diameter (inches) | Inside diameter (mm) | Alphabetical sizes (Australia, UK, etc) |
---|---|---|
0.602″ | 15.3 mm | I |
0.61″ | 15.5 mm | J |
0.618″ | 15.7 mm | J 1/2 |
0.626″ | 15.9 mm | K |