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Pinky Ring Size Chart: MM, Inches, US, UK & EU Sizes + Free PDF


Pinky Ring Size Chart: Sizes in MM, Inches, US, UK & EU

A pinky ring size chart converts your little finger measurement into a ring size. Pinky rings use the same US, UK and EU sizes as any other ring, but the little finger is usually narrower than the ring finger, so you will normally need a smaller size. Use the chart below to find your size, then read the fit tips for women’s and men’s pinky rings.

Quick answer: a US size 4 pinky ring has an inner diameter of 14.88 mm (0.586 in) and an inner circumference of 46.8 mm, which is UK H and EU 47. Measure your own little finger in mm and match it to the chart; sizes vary a little by brand.
Get the printable pinky ring size chartFree A4 PDF with a 100% print-scale check. No sign-up needed.

Download the Pinky Ring Size Chart PDF

How Pinky Rings Are Sized

A pinky ring is simply a ring worn on the little finger. It is sized exactly like any other ring: by the inside diameter or circumference of the band. The ISO 8653 standard defines ring size by inside circumference in millimetres; see the ring size overview for background.

The little finger is narrower than the ring finger, so pinky rings tend to sit toward the smaller end of the scale. How much smaller varies from person to person, and your left and right pinky can differ too, which is why measuring the finger itself is more reliable than guessing from your usual size.

Pinky Ring Size Conversion Chart (MM, Inches, US, UK, EU)

Inner diameter is the width across the inside of the band. Inner circumference is the distance around it. Highlighted rows are common reference points.

Pinky ring size conversion chart, US sizes 3 to 13
Ring size (US) Inner diameter (mm) Inner diameter (in) Inner circumference (mm) US UK EU
3 14.07 0.554 44.2 3 F 44
3.5 14.47 0.570 45.5 3.5 G 45
4 14.88 0.586 46.8 4 H 47
4.5 15.29 0.602 48.0 4.5 I 48
5 15.69 0.618 49.3 5 J½ 49
5.5 16.10 0.634 50.6 5.5 K½ 51
6 16.51 0.650 51.9 6 L½ 52
6.5 16.91 0.666 53.1 6.5 M½ 53
7 17.32 0.682 54.4 7 N½ 54
7.5 17.73 0.698 55.7 7.5 O½ 56
8 18.13 0.714 57.0 8 P½ 57
8.5 18.54 0.730 58.2 8.5 Q½ 58
9 18.95 0.746 59.5 9 R½ 60
9.5 19.35 0.762 60.8 9.5 S½ 61
10 19.76 0.778 62.1 10 T½ 62
10.5 20.16 0.794 63.3 10.5 U½ 63
11 20.57 0.810 64.6 11 V½ 65
11.5 20.98 0.826 65.9 11.5 W½ 66
12 21.38 0.842 67.2 12 X½ 67
12.5 21.79 0.858 68.5 12.5 Z 68
13 22.20 0.874 69.7 13 Z½ 70

Formulas used: circumference = π × diameter; inches = mm ÷ 25.4; EU size = inner circumference in mm, rounded. UK letters are matched to the nearest published inner diameter. Sizes vary slightly by brand.

Women’s Pinky Ring Sizes

Many women find their pinky ring falls somewhere between about US 3 and US 6, though hands differ. See also the women’s ring size chart.

Women’s pinky ring sizes: US 3 to 6
Ring size (US) Inner diameter (mm) Inner diameter (in) Inner circumference (mm) US UK EU
3 14.07 0.554 44.2 3 F 44
3.5 14.47 0.570 45.5 3.5 G 45
4 14.88 0.586 46.8 4 H 47
4.5 15.29 0.602 48.0 4.5 I 48
5 15.69 0.618 49.3 5 J½ 49
5.5 16.10 0.634 50.6 5.5 K½ 51
6 16.51 0.650 51.9 6 L½ 52

Men’s Pinky Ring Sizes

Many men choose a pinky ring between about US 5 and US 9, often in a signet or band style. Heavier or flat-top designs can feel snugger, so consider a quarter to half size up if you are between sizes. See also the men’s ring size chart and our signet ring size chart.

Men’s pinky ring sizes: US 5 to 9
Ring size (US) Inner diameter (mm) Inner diameter (in) Inner circumference (mm) US UK EU
5 15.69 0.618 49.3 5 J½ 49
5.5 16.10 0.634 50.6 5.5 K½ 51
6 16.51 0.650 51.9 6 L½ 52
6.5 16.91 0.666 53.1 6.5 M½ 53
7 17.32 0.682 54.4 7 N½ 54
7.5 17.73 0.698 55.7 7.5 O½ 56
8 18.13 0.714 57.0 8 P½ 57
8.5 18.54 0.730 58.2 8.5 Q½ 58
9 18.95 0.746 59.5 9 R½ 60

Pinky vs Ring Finger: How Much Smaller?

Pinky versus ring finger sizeA narrow little finger on the left and a wider ring finger on the right, showing the pinky usually needs a smaller ring size, often by one to three sizes. PinkyNarrower fingerUsually a smaller size Ring fingerWider fingerOften 1 to 3 sizes larger
The little finger is usually narrower than the ring finger, so it often needs a smaller size.

Many people find the pinky is about one to three sizes smaller than the ring finger, but this is a rough guide only. Measure the pinky directly, and check the seller’s size notes and return policy, because band width and shape differ by maker.

Ring fit by finger
Finger How it compares Fit tip
Pinky Usually the smallest size, often one to three sizes under the ring finger Measure the pinky itself; your two hands can differ
Ring finger Your usual ring size Use as a rough reference only
Index finger Often about one size larger than the ring finger Measure it separately, since hands vary

How to Measure Pinky Ring Size in MM and Inches

Millimetres are the most accurate unit. Convert to inches by dividing by 25.4. Our how to measure your ring size guide and the ring size calculator cover more methods.

Measure an Existing Ring

Measuring the inner diameter of a pinky ringA small ring seen from above, with a horizontal line across the inside edge to edge labelled inner diameter.

Inner diameter 1. Measure inside edgeto inside edge, not theouter edge of the band. 2. Read it in mm.Inches = mm ÷ 25.4Example: 16.51 mm = 0.650 in
Measure the inside of the band edge to edge, not the outside.
  1. Choose a ring that fits the same finger comfortably.
  2. Lay it flat and measure the inside width at its widest point, in mm.
  3. Find the nearest value in the “Inner diameter (mm)” column.
  4. Multiply the diameter by 3.1416 to check the circumference.

Measure Finger Circumference with a Paper Strip

Measuring finger circumference with a paper stripA paper strip wrapped around a finger with a pen mark where the end overlaps, then laid flat against a ruler. 1. Wrap and mark 0mmmm Length 0 to mark = circumference 2. Lay flat and measure in mm
Wrap, mark, then measure the strip against a ruler.
  1. Cut a strip of paper about 10 mm wide and 150 mm long.
  2. Wrap it around the base of the little finger and mark where it overlaps.
  3. Lay the strip flat and measure from the end to the mark in mm.
  4. Match the result to the “Inner circumference (mm)” column. Use string or a tape measure the same way.
Tip: measure at the end of the day when fingers are warm, and repeat three times. If your knuckle is larger than the base of your finger, choose a size that passes the knuckle.
Print the chart and check your sizeFree A4 PDF with a 100% print-scale check. No sign-up needed.

Download the Pinky Ring Size Chart PDF

How to Choose the Right Pinky Ring Size

  • Measure the pinky itself. Do not simply subtract from your ring-finger size.
  • Use millimetres. Compare your circumference with the chart and the seller’s size notes.
  • Check the band width. Wide bands feel tighter; go up a quarter to a half size if between sizes.
  • Check the knuckle. The ring must pass over it and still sit snugly.
  • Test the fit. It should turn with slight effort and not slip off when your hand is relaxed.

Can Pinky Rings Be Resized?

Often, but ask a jeweller before you buy or alter one. Engraving, hallmarks and inset stones can limit resizing, and very thin bands can be harder to adjust. Related guides: US ring size chart, UK ring size chart and ring size conversion chart.

Pinky Ring Size FAQs

What is the average pinky ring size?

There is no single standard, because hands vary. Many women wear a pinky ring somewhere around US 3 to 6 and many men around US 5 to 9, but the only reliable answer is to measure your own little finger and match it to the chart on this page.

How much smaller is a pinky than a ring finger?

Often about one to three sizes smaller, though this differs from person to person and even between your left and right hand. Measure the pinky itself rather than subtracting from your ring-finger size.

What size pinky ring do I need for a man?

Men commonly choose a pinky ring between about US 5 and US 9. Heavy signet or flat-top styles can feel tighter, so many people go up a quarter to a half size. Measure first and check the seller’s size notes.

What size pinky ring do I need for a woman?

Many women find a pinky ring falls between about US 3 and US 6. Use a paper strip or string to measure the base of your little finger in millimetres and read the matching size from the chart.

How do I measure my pinky ring size at home?

Wrap a thin strip of paper around the base of your little finger, mark the overlap and measure the length in millimetres. Match that circumference to the chart. You can also measure the inside diameter of a ring that already fits that finger.

Which hand and finger is a pinky ring traditionally worn on?

Traditionally on the little finger of the non-dominant hand, though many people wear pinky rings on either hand today. Fingers can differ slightly between hands, so measure the one you will wear it on.

Should I size up for a wide pinky ring?

Often a little. A wide band covers more of the finger and tends to feel tighter than a thin band of the same size. If you are between sizes, many people go up a quarter to a half size. A jeweller or the seller can confirm.

Can a pinky ring be resized?

Often it can, but a jeweller has to check first. Engraving, hallmarks, inset stones and very thin or very thick shanks can limit how much a ring can be resized. Very small sizes can also be harder to find in stock, so getting the size right first is worthwhile.

Related Ring Size Guides

Download your free pinky ring size chartFree A4 PDF with a 100% print-scale check. No sign-up needed.

Download the Pinky Ring Size Chart PDF

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