Your ring.
Your fit.
Your everyday ring should feel effortless. A few simple checks will help you find your fit.
Guide preview only. Download the PDF to measure.
Print it.
Wrap it.
Make it yours.
A printer, scissors and a standard credit card. That’s all you need for a first size estimate at home.
Free two-page illustrated PDFs. Choose the paper in your printer.
Start at the right scale.
Print at 100% or Actual size. Turn off Fit to page. Match your card to the outline and check the 50 mm line with a ruler. If either is off, reprint.
A little cut. A gentle wrap.
Cut along the dashed outline. Wrap around the finger you’ll wear your ring on, snug but never tight. Read where the START edge meets the size scale.
Give it a second check.
Check that the loop passes your knuckle. Measure again later with warm, relaxed hands. Between marks? Try both neighbouring sizes with a physical ring sizer.
Let a ring you love
show you the way.
Choose a round ring that fits the same finger well. Measure straight across its centre, from inside edge to inside edge, in millimetres. Enter that diameter below. A similar band width gives a more useful comparison.
Find your
starting size.
Measured your finger or a ring you love? Enter millimetres to find the closest whole US reference size.
Your estimate will appear here. Use the table to compare nearby sizes.
The size reference.
ALL MEASUREMENTS IN MM| US size | Inside diameter | Circumference |
|---|---|---|
| 4 | 14.9 | 46.8 |
| 5 | 15.7 | 49.3 |
| 6 | 16.5 | 51.8 |
| 7 | 17.3 | 54.3 |
| 8 | 18.1 | 56.9 |
| 9 | 19.0 | 59.7 |
| 10 | 19.8 | 62.2 |
| 11 | 20.6 | 64.7 |
| 12 | 21.4 | 67.2 |
| 13 | 22.2 | 69.7 |
General reference sizes, not a list of available Reeng stock. Half sizes are not shown. Measurements follow the GIA size chart.
Comfort is the final check. Paper is a starting point. Printing, band width and the way you measure can change the result. For a confident fit, confirm with a jeweller’s physical ring sizer before ordering.
A few things
worth knowing.
Can I use my credit card on the screen?
Screens and zoom levels vary, so this guide uses your card to check the printed PDF instead. Both edges of the card must match the outline, and the 50 mm ruler check must also be correct.
How should my ring feel?
Comfortable at the base of your finger, with a little resistance over your knuckle. It should not pinch. Wider bands can feel tighter, so check with a physical sizer of a similar width.
What if I fall between two sizes?
Try both neighbouring sizes with a jeweller. Finger shape and band width affect the right choice. The calculator shows the closest whole reference size, not a guaranteed fit.
Are all these sizes available from Reeng?
This is a general US sizing reference. Confirm available Reeng sizes before placing your order; the chart does not indicate stock or half-size availability.
Can I measure without a printer?
Measure the inside diameter of a ring that fits your chosen finger, or visit a jeweller for a physical fitting. Avoid stretchy string and measuring directly from an on-screen diagram.