Ring Size chart

 

Ring sizes are not universal in everyday language, but they are standardised in manufacturing.

At LÓBA, we base our sizing on ISO 8653, the international jewellery standard used by professional makers to align UK, US and EU systems.

This means that the UK uses letters, US uses numbers and EU uses millimetres of circumference. Different labels, same finger. 

How to Measure Your Ring Size

Step 1 : Take a thin strip of paper or string

Step 2 : Wrap it around the base of your finger

Step 3 : Mark where it meets (snug, not tight)

Step 4: Measure the length in mm

Step 5: Match it to the circumference column

Your fingers change size across the day because of heat and movement, so it is advisable to measure at the end of day because your fingers are slightly warmer then. 

The Ring Size Chart

UK Size US Size EU Size Internal Diameter (mm) Circumference (mm)
F 3 44 14.1 mm 44.2 mm
G 3.5 45 14.5 mm 45.5 mm
H 4 46 14.9 mm 46.8 mm
I 4.5 47 15.3 mm 48.0 mm
J 5 49 15.7 mm 49.3 mm
K 5.5 50 16.1 mm 50.6 mm
L 6 51–52 16.5 mm 51.9 mm
M 6.5 52–53 16.9 mm 53.1 mm
N 7 54 17.3 mm 54.4 mm
O 7.5 55 17.7 mm 55.7 mm
P 8 56 18.1 mm 57.0 mm
Q 8.5 57–58 18.5 mm 58.3 mm
R 9 59 18.9 mm 59.5 mm
S 9.5 60–61 19.4 mm 60.8 mm
T 10 62 19.8 mm 62.1 mm