Ring Sizer
This tool helps you find the size of a ring. It’s based on the height of a credit card, so it’s important to measure that accurately. We recommend putting your phone on a flat surface and looking straight down at it.
This tool is for reference use. Fit may vary depending on the wearer, environment worn and activities carried out at the time of wearing your ring. It is recommended that you should:
- Choose a ring that fits you most comfortably
- Use a ring that fits on all occasions, when you’re on holiday, in work or the gym
Put the short side of a credit card here and adjust the outline via the slider below.
You should be able to just see the outline when looking strait at your phone.
Place a ring on the circle and line up the inside of the band so that you can see the black outline inside.
15.4mm
US Size 7 UK Size N
Your size is I ½, 15.4mm
| Inside Diameter | Inside Circumference | Ring Size |
|---|---|---|
| 14.5mm | 3.75mm | G |
| 14.8mm | 4.25mm | H |
| 15.2mm | 4.5mm | I |
| 15.6mm | 5.0mm | J |
| 16.0mm | 5.5mm | Κ |
| 16.4mm | 6.0mm | L |
| 16.8mm | 6.5mm | M |
| 17.2mm | 6.75mm | N |
| 17.4mm | 7.0mm | O |
| 18.0mm | 7.5mm | P |
| 18.4mm | 8.0mm | Q |
| 19.0mm | 8.5mm | R |
| 19.2mm | 9.0mm | S |
| 19.5mm | 9.5mm | T |
| 20.0mm | 10.0mm | U |
| 20.3mm | 10.5mm | V |
| 20.7mm | 11.0mm | W |
| 21.1mm | 11.5mm | X |
| 21.4mm | 12.0mm | Y |
| 21.8mm | 12.5mm | Z |
