MyRingSize

Printable ring sizer

Print this page at 100% scale, check the calibration line below, then place a ring you already own over the circles — the circle that matches its inside edge is its size.

Before you trust the printout

  1. Print at exactly 100%. In the print dialog, set scale to 100% or "Actual size" and turn off "Fit to page". Any scaling silently shrinks every circle.
  2. Verify with the check bar. The black bar in the sheet is exactly 85.60 mm long — the width of a standard bank card. After printing, lay your bank card (or a ruler) against it. If the bar is not exactly card-width, the print is scaled: fix the scale setting and print again.
  3. Then measure. Rest your ring on the circles and find the one whose edge aligns with the ring's inside edge all the way around.

Ring sizer — printed size check
← 85.60 mm — must match your bank card exactly →
US 4
Ø 14.9 mm
US 5
Ø 15.7 mm
US 6
Ø 16.5 mm
US 7
Ø 17.3 mm
US 8
Ø 18.1 mm
US 9
Ø 19.0 mm
US 10
Ø 19.8 mm
US 11
Ø 20.6 mm
US 12
Ø 21.4 mm

Circles show the inside diameter of each US size (ISO 8653 measurements). Match the inside edge of your ring to a circle. MyRingSize — myringsize.pages.dev

No printer? Two other ways

Use the on-screen sizer with a bank-card calibration, or the paper-strip method with any ruler. Both get you within about a quarter size, which is enough for most purchases — and for anything expensive, have a jeweller confirm with a sizing set before the ring is made.