Printable Ring Sizer — Print at 100%
Print this page at 100% scale (Actual Size — never “Fit to page”), check the 50 mm bar with a ruler, then place your ring over the circles or cut out the paper strip sizer.
Last updated: November 2026
Before you trust this page: print at 100% / Actual Size, then measure the black bar below with a real ruler. It must measure exactly 50 mm. If it does not, fix your printer scaling and reprint.
Accuracy check bar — must measure 50 mm
Ring size circles — match the inside edge
Place a ring that fits over each circle. The right circle touches the ring's inside edge all the way round.
US 3
14.1 mm
14.1 mm
US 3.5
14.5 mm
14.5 mm
US 4
14.9 mm
14.9 mm
US 4.5
15.3 mm
15.3 mm
US 5
15.7 mm
15.7 mm
US 5.5
16.1 mm
16.1 mm
US 6
16.5 mm
16.5 mm
US 6.5
16.9 mm
16.9 mm
US 7
17.3 mm
17.3 mm
US 7.5
17.7 mm
17.7 mm
US 8
18.1 mm
18.1 mm
US 8.5
18.5 mm
18.5 mm
US 9
18.9 mm
18.9 mm
US 9.5
19.4 mm
19.4 mm
US 10
19.8 mm
19.8 mm
US 10.5
20.2 mm
20.2 mm
US 11
20.6 mm
20.6 mm
US 11.5
21.0 mm
21.0 mm
US 12
21.4 mm
21.4 mm
US 12.5
21.8 mm
21.8 mm
US 13
22.2 mm
22.2 mm
Honest note on charts: Ring size charts vary by up to half a size between jewellers. Always confirm your size in millimetres — inner diameter or circumference — with the jeweller you are buying from before you order.
Paper strip sizer
Cut along the strip, wrap it snugly around the base of your finger, mark where it overlaps, and read the length against the chart — or measure it in mm and use the calculator.
✂ Cut here — wrap around finger — mark the overlap — US 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 ✂
Prefer screen sizing? Try the on-screen ring sizer. Full numbers live on the ring size chart, and measuring tips are in how to measure ring size.