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MAPPIN & WEBB GUIDE

How To Measure
Your Ring Size

How To Measure
Your Ring Size

Before you buy your forever ring, we recommend that you check your ring size. If you are unable to visit your nearest UK showroom where our experts can do this for you, the below gives guidance on a choice of two methods to use at home.

Measure a Finger
Measure a Ring
Measure Ring Size Step One image

Step One

Decide which is the largest finger on which you will wear your ring. Using a narrow strip of paper, wrap it around the base of this finger.

Measure Ring Size Step 2 image

Step Two

Ensure the paper has a tight fit to gain the most accurate result. Using a fine tip pen, clearly mark where the end of the paper meets the rest of the strip.

Measure Ring Size Step 3 image

Step Three

Measure the length of paper to the point you have marked. This measurement is the circumference of your finger.

Download Printable Ring Sizer

For more help, please see our know & measure your ring size guide, where you will have the option to download and print our ring sizer pdf.

Measure Diameter Step 1 image

Step One

Choose a ring that fits your chosen finger comfortably.

Diameter - Step 2 image

Step Two

Lay the ring on top of a tape measure and measure the widest point of the ring, from each inner edge. Round up to the nearest millimetre.

Diameter - Step 3 image

Step Three

This measurement gives you the ring diameter. Use the ring size chart to determine your size by matching it to your ring diameter.

Find Your Ring Size Chart

Here at Mappin & Webb, our ring sizes are specified in standard UK sizing. For ease, we have also illustrated the conversions to Europe, US and China sizing, to ensure that you choose the perfect size for you.

Circumference
Inside Diameter

Swipe to see more

Circumference Ring Size
(mm) UK Europe US China
37.8mm A - 1/2 -
39.1mm B - 1 -
40.4mm C - 1 1/2 -
41.7mm D 41 1/2 2 -
42.9mm E 42 3/4 2 1/2 -
44.2mm F 44 3 -
45.5mm G 45 1/4 3 3/8 -
46.8mm H 46 1/2 3 3/4 8
48.0mm I 47 3/4 4 1/4 9
48.7mm J 49 4 5/8 10
50.0mm K 50 5 1/8 11
51.2mm L 51 3/4 5 1/2 12
52.5mm M 52 3/4 6 13
53.8mm N 54 6 1/2 -
55.1mm O 55 1/4 7 -
56.3mm P 56 1/2 7 1/2 17
57.2mm Q 57 3/4 8 5/8 18
58.9mm R 59 8 5/8 19
60.2mm S 60 1/4 9 1/8 20
61.4mm T 61 1/2 9 5/8 21
62.7mm U 62 3/4 10 1/4 23
64.0mm V 63 10 5/8 24
65.3mm W 65 11 1/8 25
66.6mm X 66 1/4 11 5/8 26
67.8mm Y 67 1/2 12 27
68.5mm Z 68 3/4 12 1/2 28
Circumference
(mm)
37.8mm
39.1mm
40.4mm
41.7mm
42.9mm
44.2mm
45.5mm
46.8mm
48.0mm
48.7mm
50.0mm
51.2mm
52.5mm
53.8mm
55.1mm
56.3mm
57.2mm
58.9mm
60.2mm
61.4mm
62.7mm
64.0mm
65.3mm
66.6mm
67.8mm
68.5mm

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Inside Diameter Ring Size
(mm) UK Europe US China
11.9mm A - 1/2 -
12.3mm B - 1 -
12.7mm C - 1 1/2 -
13.1mm D 41 1/2 2 -
13.5mm E 42 3/4 2 1/2 -
13.9mm F 44 3 -
14.3mm G 45 1/4 3 3/8 -
14.7mm H 46 1/2 3 3/4 8
15.1mm I 47 3/4 4 1/4 9
15.5mm J 49 4 5/8 10
15.9mm K 50 5 1/8 11
16.3mm L 51 3/4 5 1/2 12
16.7mm M 52 3/4 6 13
17.1mm N 54 6 1/2 -
17.5mm O 55 1/4 7 -
17.9mm P 56 1/2 7 1/2 17
18.2mm Q 57 3/4 8 18
18.6mm R 59 8 5/8 19
19.1mm S 60.4 9 1/8 20
19.5mm T 61 1/2 9 5/8 21
20.0mm U 62 3/4 10 1/4 23
20.3mm V 63 10 5/8 24
20.7mm W 65 11 1/8 25
21.2mm X 66 1/4 11 5/8 26
21.5mm Y 67 1/2 12 27
21.9mm Z 68 3/4 12 1/2 28
Inside Diameter
(mm)
11.9mm
12.3mm
12.7mm
13.1mm
13.5mm
13.9mm
14.3mm
14.7mm
15.1mm
15.5mm
15.9mm
16.3mm
16.7mm
17.1mm
17.5mm
17.9mm
18.2mm
18.6mm
19.1mm
19.5mm
20.0mm
20.3mm
20.7mm
21.1mm
21.5mm
21.9mm

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Circumference Inside Diameter Ring Size
(mm) (mm) UK Europe US China
37.8mm 11.9mm A - 1/2 -
39.1mm 12.3mm B - 1 -
40.4mm 12.7mm C - 1 1/2 -
41.7mm 13.1mm D 41 1/2 2 -
42.9mm 13.5mm E 42 3/4 2 1/2 -
44.2mm 13.9mm F 44 3 -
45.5mm 14.3mm G 45 1/4 3 3/8 -
46.8mm 14.7mm H 46 1/2 3 3/4 8
48.0mm 15.1mm I 47 3/4 4 1/4 9
48.7mm 15.5mm J 49 4 5/8 10
50.0mm 15.9mm K 50 5 1/8 11
51.2mm 16.3mm L 51 3/4 5 1/2 12
52.5mm 16.7mm M 52 3/4 6 13
53.8mm 17.1mm N 54 6 1/2 -
55.1mm 17.5mm O 55 1/4 7 -
56.3mm 17.9mm P 56 1/2 7 1/2 17
57.2mm 18.2mm Q 57 3/4 8 18
58.9mm 18.6mm R 59 8 5/8 19
60.2mm 19.1mm S 60 1/4 9 1/8 20
61.4mm 19.5mm T 61 1/2 9 5/8 21
62.7mm 20.0mm U 62 3/4 10 1/4 23
64.0mm 20.3mm V 63 10 5/8 24
65.3mm 20.7mm W 65 11 1/8 25
66.6mm 21.1mm X 66 1/4 11 5/8 26
67.8mm 21.5mm Y 67 1/2 12 27
68.5mm 21.5mm Z 68 3/4 12 28
Show More Sizes
Show Less Sizes

Measuring Tips

  • The best time of day to measure your ring size in mm is in the evening, when your fingers are largest. Avoid measuring when you’re cold, as fingers are at least half a size smaller.
  • When measuring your finger or ring, always round up to the nearest millimetre.
  • The thicker the ring, the tighter the fit, so if you choose a ring with a deep band width, you will likely need to go up one size.
  • If you are considering a stackable ring, you may desire a looser fit, in which case we recommend you choose one size up from your measured ring size.
Ring measuring tips
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