Men's ring size chart

Most men wear US 9 to 12; the most common size is 10, which is 19.76 mm inside (UK T½, EU 62). A 7 mm or wider band grips more of the finger, so order half to a full size up; a comfort-fit band, a quarter to half down. Check yours at true 1:1 size on screen.

Try

Lay a ring that fits flat on the circle and size the red line until it just touches the inside edge of the band all the way round: on a phone, slide sideways anywhere on the stage or hold the buttons below; on a computer, drag the edge, scroll or press ← →. The gold ring is the band’s wall: don’t match its outside.

US 1019.76 mm · 0.778" inside · 62.1 mm round

Inside diameter19.76 mm

Band wall2.2 mm

Jump to US

Ring size & conversion sheet

estimated scale

US / Canada

exact 10.00

Inside diameter

0.778"

19.76 mm

UK / Australia

T½

BS 6820 letters

EU / ISO 8653

62.1 mm round

Japan

JCS table

Swiss / Italy

ISO − 40

Measurements

Inside circumference62.1 mm · 2.444"

Inside diameter19.76 mm · 0.778"

Quarter-size step±0.20 mm Ø · ±0.64 mm roundA quarter size is about the width of three sheets of paper on the diameter.

Band width

7 mm and wider band+½ to +1Wide and cigar bands grip the whole finger segment: half a size to a full size up.

Neighbouring sizes

Smart rings

Oura Ring 4kit 4–15Smooth titanium inside; sensors recessed to 0.3 mm

Oura Ring Gen 3kit 6–13Epoxy inside with sensor bumps about 1.3 mm high

Galaxy Ringkit 5–15Three raised sensor bumps; wear them toward the palm

Smart-ring sizes don’t match jewellery sizes: use your size here as a baseline and confirm with the maker’s sizing kit.

For jewellers

Blank length, 1.5 mm stock66.8 mmπ × (inside diameter + thickness)

Blank length, 2.0 mm stock68.4 mm

Full chart 37 rows

Sort any column, download it as CSV or print it. Click a row to show it at 1:1.

Men’s ring sizes and wide-band ordering

37 rows

Download CSV

Men's ring sizes US 7 to 16 in quarter sizes, with inside diameter, UK and EU sizes and the size to order for 4–6 mm, 7 mm+ and comfort-fit bands

17.32	54.4	N½	54	7¼–7½	7½–8	6½–6¾	60.7 mm
17.52	55.0	O	55	7½–7¾	7¾–8¼	6¾–7	61.3 mm
17.73	55.7	O½	56	7¾–8	8–8½	7–7¼	62.0 mm
17.93	56.3	P	56	8–8¼	8¼–8¾	7¼–7½	62.6 mm
18.13	57.0	P½	57	8¼–8½	8½–9	7½–7¾	63.2 mm
18.34	57.6	Q	58	8½–8¾	8¾–9¼	7¾–8	63.9 mm
18.54	58.2	Q½	58	8¾–9	9–9½	8–8¼	64.5 mm
18.74	58.9	R	59	9–9¼	9¼–9¾	8¼–8½	65.2 mm
18.95	59.5	R½	60	9¼–9½	9½–10	8½–8¾	65.8 mm
19.15	60.2	S	60	9½–9¾	9¾–10¼	8¾–9	66.4 mm
19.35	60.8	S½	61	9¾–10	10–10½	9–9¼	67.1 mm
19.55	61.4	T	61	10–10¼	10¼–10¾	9¼–9½	67.7 mm
19.76	62.1	T½	62	10¼–10½	10½–11	9½–9¾	68.4 mm
19.96	62.7	U	63	10½–10¾	10¾–11¼	9¾–10	69.0 mm
20.16	63.3	U½	63	10¾–11	11–11½	10–10¼	69.6 mm
20.37	64.0	V	64	11–11¼	11¼–11¾	10¼–10½	70.3 mm
20.57	64.6	V½	65	11¼–11½	11½–12	10½–10¾	70.9 mm
20.77	65.3	W	65	11½–11¾	11¾–12¼	10¾–11	71.5 mm
20.98	65.9	W½	66	11¾–12	12–12½	11–11¼	72.2 mm
21.18	66.5	X	67	12–12¼	12¼–12¾	11¼–11½	72.8 mm
21.38	67.2	X½	67	12¼–12½	12½–13	11½–11¾	73.5 mm
21.59	67.8	Y½	68	12½–12¾	12¾–13¼	11¾–12	74.1 mm
21.79	68.5	Z	68	12¾–13	13–13½	12–12¼	74.7 mm
21.99	69.1	Z½	69	13–13¼	13¼–13¾	12¼–12½	75.4 mm
22.20	69.7	Z+1	70	13¼–13½	13½–14	12½–12¾	76.0 mm
22.40	70.4	Z+1½	70	13½–13¾	13¾–14¼	12¾–13	76.7 mm
22.60	71.0	Z+2	71	13¾–14	14–14½	13–13¼	77.3 mm
22.81	71.6	Z+2½	72	14–14¼	14¼–14¾	13¼–13½	77.9 mm
23.01	72.3	Z+3	72	14¼–14½	14½–15	13½–13¾	78.6 mm
23.21	72.9	Z+3½	73	14½–14¾	14¾–15¼	13¾–14	79.2 mm
23.42	73.6	Z+4	74	14¾–15	15–15½	14–14¼	79.8 mm
23.62	74.2	—	74	15–15¼	15¼–15¾	14¼–14½	80.5 mm
23.82	74.8	—	75	15¼–15½	15½–16	14½–14¾	81.1 mm
24.03	75.5	—	75	15½–15¾	15¾–16¼	14¾–15	81.8 mm
24.23	76.1	—	76	15¾–16	16–16½	15–15¼	82.4 mm
24.43	76.8	—	77	16–16¼	16¼–16¾	15¼–15½	83.0 mm
24.63	77.4	—	77	16¼–16½	16½–17	15½–15¾	83.7 mm

05 / Field guide

Wide bands
fit tighter.

Men’s rings are usually wider and heavier than women’s, and width changes how a size feels. The chart below gives every quarter size from 7 to 16 with the size to order for medium, wide and comfort-fit bands, so a measured size turns into the right order.

What size do most men wear?

Jewellers who publish their order data report that most men wear a US 9 to 12, with 10 the single most common size. A 10 is 19.76 mm across the inside, UK T½ and EU 62. Ring fingers on the dominant hand often run a quarter to half size larger, and knuckles grow with age, so measure the hand and finger you will wear it on.

A size 12 and up is usual for larger hands and for thumb rings; sizes 7 to 8 suit pinky rings and slimmer fingers. Signet rings are often worn on the little finger, which is typically two to three sizes smaller than the ring finger.

Width changes the size you need

A narrow band under 4 mm touches a thin line of skin and fits true to size. A 4 to 6 mm band covers more of the finger segment, and jewellers suggest a quarter to half size up. At 7 mm and wider, including cigar bands and most tungsten and titanium wedding bands, the advice is half a size to a full size up, because the band presses on the whole segment and cannot rock over the knuckle as easily.

Comfort-fit bands have a domed inside, so less metal touches the finger and they slide over the knuckle more easily. Many makers suggest a quarter to half size smaller in comfort fit. These are guides, not a standard: if you can, try a band of the same width before ordering, especially tungsten and ceramic, which cannot be resized.

Under 4 mm: true to size · 4–6 mm: +¼ to +½ · 7 mm+: +½ to +1 · comfort fit: −¼ to −½

Measuring a wide ring on screen

Set the band-wall slider to your ring’s thickness so the gold outline matches it, then match the red circle to the inside edge at the narrowest point. A comfort-fit band is narrowest in the middle of its width, and that is what you see from above, so the reading is its true size.

For a band you are about to order, measure a ring that fits the same finger and then use the band-width chips to see the order size. For metals that cannot be resized, stay at the larger end of the range if you are between sizes.

For the bench: blank lengths

If you make bands, the chart gives the length of stock to cut for 2 mm thick material. The neutral axis runs through the middle of the wall, so the blank is π times the inside diameter plus the thickness. A size 10 in 2 mm stock needs a 68.4 mm blank. Add a little for filing and the solder seam.

Blank length = π × (inside Ø + stock thickness)

Questions

Answered plainly.

01What is the average men’s ring size?+

About a US 10, which is 19.76 mm inside and UK T½. Jewellers’ order data puts most men between 9 and 12.

02Should I size up for a wide band?+

Usually yes. For 4–6 mm bands go a quarter to half size up; for 7 mm and wider, half to a full size up. Comfort-fit bands can be a quarter to half size smaller.

03What is a size 10 ring in mm?+

A US size 10 is 19.76 mm (0.778") across the inside, with a 62.1 mm inside circumference. It is UK T½, EU 62 and Japan 21.

04Can a tungsten ring be resized?+

No. Tungsten carbide, ceramic and most titanium bands cannot be stretched or cut and soldered, so measure carefully and size for the band width before ordering.

05Is a men’s size 11 the same as a women’s size 11?+

Yes. Ring sizes are unisex: a US 11 is 20.57 mm inside whoever wears it. Only the typical ranges differ.

06How do I measure my ring size without a ring sizer?+

Lay a ring that fits on the 1:1 circle on this page after calibrating your screen, or wrap a 5 mm paper strip round the base of your finger and read it on the 1:1 ruler. Avoid string: it stretches.