Printable Ring Size Chart

Print at actual size. Check the credit-card box first, then use the circles or paper strip.

1. Check print scale

Your card should match this box. If it does not, reprint at 100% / actual size.

Credit card check
85.6 mm x 53.98 mm

This line must be 50 mm.

2. Use the paper strip

Cut the strip, wrap it around the finger, mark the overlap, then measure the length.

cut, wrap, mark
  • Wrap snug, not tight.
  • Measure at the end of the day.
  • Round up if between sizes.

3. Match a ring to a circle

Place a ring over the circle. The inside edge of the ring should touch the outside of the printed circle.

US 4
14.9 mm
US 4.5
15.3 mm
US 5
15.7 mm
US 5.5
16.1 mm
US 6
16.5 mm
US 6.5
16.9 mm
US 7
17.3 mm
US 7.5
17.7 mm
US 8
18.1 mm
US 8.5
18.5 mm
US 9
18.9 mm
US 9.5
19.4 mm
US 10
19.8 mm
US 10.5
20.2 mm
US 11
20.6 mm
US 11.5
21.0 mm
US 12
21.4 mm
US 12.5
21.8 mm
US 13
22.2 mm

Convert the printed measurement

54 mm circumference is about US 7, UK N 1/2, EU 54.

Thin band chart size, with no fit adjustment.

Converted sizes

US / CanadaUS / Canada
7
UK / AustraliaUK / Australia
N 1/2
EU / ISOEU / ISO
54
Japan / ChinaJapan / China
14
IndiaIndia
14
Diameter
17.2 mm
Circumference (mm)
54.0 mm
Circumference (in)
2.126 in

Computed with the same conversion engine as the Ring Sizer app. Use thin band for pure chart conversion; use a wider band when you want a fit recommendation.

Open full chartUse calculator
The most accurate option

No printer? No problem

If the printout never quite lines up, skip the paper. The app measures your size right on screen, calibrated to your exact phone, the most accurate option short of a trip to the jeweler.

Paper or string74%
On screen (app)96%
AppleDownload Ring Sizer
  • Free
  • iOS
  • No sign-up
  • Works offline
Ring Sizer app measuring a ring size on screen