SizeCompass

Free Printable Ring Sizer

Print this page at 100% scale, then place a ring you own over the circles below — the circle your ring's inner edge matches is your size. There's also a measuring strip to wrap around your finger.

Important — print at actual size: In the print dialog, set Scale to 100% (not "Fit to page") and paper to A4 or Letter. Check the 50 mm ruler below with a real ruler before measuring.

Calibration check — this bar must measure exactly 50 mm:

0 25 mm 50

Ring size circles

Lay a ring over each circle until the inside of your ring lines up with a circle's outline.

US 3
14 mm · UK F
US 3.5
14.4 mm · UK G
US 4
14.8 mm · UK H
US 4.5
15.2 mm · UK I
US 5
15.7 mm · UK J½
US 5.5
16.1 mm · UK L
US 6
16.5 mm · UK M
US 6.5
16.9 mm · UK N
US 7
17.3 mm · UK O
US 7.5
17.7 mm · UK P
US 8
18.1 mm · UK Q
US 8.5
18.5 mm · UK Q½
US 9
19 mm · UK R½
US 9.5
19.4 mm · UK S½
US 10
19.8 mm · UK T½
US 10.5
20.2 mm · UK U½
US 11
20.6 mm · UK V½
US 11.5
21 mm · UK W½
US 12
21.4 mm · UK Y
US 12.5
21.8 mm · UK Z
US 13
22.2 mm · UK Z+1

Finger-measuring strip

Cut along the strip, wrap it around the base of your finger, and read the millimetre mark where it overlaps — that's your circumference. Match it in the chart below.

0
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25
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45
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75
↤ wrap around finger, read mm at overlap ↦

Circumference → ring size

Circumference (mm) Diameter (mm) US UK EU JP
44.2 14 3 F 44 4
45.5 14.4 3.5 G 46 5
46.8 14.8 4 H 47 7
48 15.2 4.5 I 48 8
49.3 15.7 5 J½ 49 9
50.6 16.1 5.5 L 51 10
51.9 16.5 6 M 52 12
53.1 16.9 6.5 N 53 13
54.4 17.3 7 O 54 14
55.7 17.7 7.5 P 56 15
57 18.1 8 Q 57 16
58.3 18.5 8.5 Q½ 58 17
59.5 19 9 R½ 59 18
60.8 19.4 9.5 S½ 61 19
62.1 19.8 10 T½ 62 20
63.4 20.2 10.5 U½ 63 22
64.6 20.6 11 V½ 65 23
65.9 21 11.5 W½ 66 24
67.2 21.4 12 Y 67 25
68.5 21.8 12.5 Z 68 26
69.7 22.2 13 Z+1 70 27

→ Full guide: how to measure your ring size · Ring size converter