Size Guide

A few quick ways to find your fit — and if you're still unsure, just ask.

Rings

Find your ring size

Start with a ring that fits the finger you’re shopping for.

Inside diameter
Illustration is not to scale.
  1. Lay your ring flat against a ruler marked in millimeters.
  2. Measure straight across the center, from one inside edge to the other. Leave out the metal band.
  3. Match that inside diameter to the U.S. size in the chart.

Prefer a printable guide?

Preview of the MFS/STONES printable ring sizer, showing the scale check and ring-size circles.
PDF preview — not to scale
Download ring sizer (PDF)

Print the PDF at 100% and use the included scale check before measuring.

Between sizes or still unsure? Email Meg for help finding your fit.

U.S. ring sizes, inside diameters, and circumferences. Measurements are in millimeters.
U.S. sizeInside diameter (mm)Circumference (mm)
3.014.144.2
3.514.545.5
4.014.946.8
4.515.348
5.015.749.3
5.516.150.6
6.016.551.9
6.516.953.1
7.017.354.4
7.517.755.7
8.018.157.0
8.518.558.3
9.019.059.5
9.519.460.8
10.019.862.1
10.520.263.4
11.020.664.6
11.521.065.9
12.021.467.2
12.521.868.5
13.022.269.7

Rings

US Size

Inside Diameter

Circumference (MM)

Ring sizing diagram: measure straight across the inside opening, from inner edge to inner edge.

14.1 mm

14.5 mm

14.9 mm

15.3 mm

15.7 mm

16.1 mm

16.5 mm

16.9 mm

17.3 mm

17.7 mm

18.1 mm

18.5 mm

19.0 mm

19.4 mm

19.8 mm

20.2 mm

20.6 mm

21.0 mm

21.4 mm

21.8 mm

22.2 mm

Necklaces

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10

10.5

11

11.5

12

12.5

13

Bracelets

44.2 mm

45.5 mm

46.8 mm

48 mm

49.3 mm

50.6 mm

51.9 mm

53.1 mm

54.4 mm

55.7 mm

57.0 mm

58.3 mm

59.5 mm

60.8 mm

62.1 mm

63.4 mm

64.6 mm

65.9 mm

67.2 mm

68.5 mm

69.7 mm

Wrap a soft tape measure or a strip of paper around your wrist, just below the wrist bone. Mark where it meets and measure against a ruler — that's your wrist size.

Add for fit: ¼–½ in for snug, ¾ in for comfortable, 1 in for loose.

Most of our bracelets run 6½–7½ in. Beaded strands sit closer to the wrist than a chain, so if you're between sizes, size up.


Print a ring sizer
PDF, 2 pages — print at 100%, the file includes a scale check.


16 in — sits at the base of the throat
18 in — just below the collarbone, our most common length
20 in — top of the neckline
22–24 in — at or just above the bust
30 in — long, layers well over the shorter lengths

Still not sure? Email meg@mfsstones.com and she’ll help you find the right fit.