Ring Sizer
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Measure on paper

Printable Ring Sizer

Download a two-page guide with a cut-out finger strip and all 43 existing-ring circles. Choose the paper loaded in your printer.

Print at 100% / Actual Size

Turn off Fit to Page, Shrink to Fit or borderless expansion. After printing, verify the 50 mm reference line and the 85.60 × 53.98 mm bank-card outline before measuring.

A4: 210 × 297 mm · US Letter: 8.5 × 11 inches · Two pages each · No signup

Reference card
Illustrative preview only — not actual size. Download and print the PDF to measure.

Use your printed guide

  1. Select A4 or US Letter in your print settings and print at actual size.
  2. Check the reference line with a physical ruler and check both dimensions of the card outline. If either is wrong, correct the settings and reprint.
  3. For an existing ring, match its inside edge to the centre of a thin circle line on page 2. If between circles, compare the neighbouring sizes.
  4. For a finger, cut out the strip on page 1. Wrap without pulling tight and read the millimetres where the starting edge overlaps. Check that the loop passes over the knuckle.
  5. Repeat the measurement twice. Use the calculator for regional sizes from the circumference.

Paper thickness, printer scaling and how tightly you wrap can affect the result. Wider bands may fit differently. Regional size labels are approximate; compare the retailer's chart before ordering.

Source: GIA reference · gia-v1 · Last verified . Sources and conversion rules.

Measure on screen · View the full size chart· How to measure ring size

Frequently Asked Questions

How do I ensure my printable ring sizer prints at 100% actual size?

In your printer settings, set 'Page Scaling' to 'None', '100%', or 'Actual Size'. Ensure options like 'Fit to Printable Area' or 'Shrink Oversized Pages' are unchecked. Both our A4 and US Letter PDF templates include a 50.00 mm calibration line and standard card outline to verify print scale before measuring.

Should I download the A4 or US Letter PDF?

Choose US Letter (8.5 × 11 inches) if you are in the United States, Canada, or Mexico. Choose A4 (210 × 297 mm) if you are in the UK, Europe, Australia, or internationally.