A little guidance, a better fit

Size Guide

Find the length and fit that feel right for you. Use these charts as a starting point, then include your measurements in your quotation request.

1 inch = 2.54 cm = 25.4 mm. Displayed conversions are rounded. These charts show reference measurements, not a guarantee that every design is available in every size.

01 / Length & layering

Necklaces

Measure a necklace you like from end to end, including its clasp. Alternatively, drape a piece of string around your neck to the length you prefer, then measure it flat. Keep any pendant drop separate from the chain length.

The same length can sit differently depending on your neck, build and neckline. For an adjustable chain, tell us your preferred length and extension length separately.

Necklace length conversions
InchesCentimetres (cm)Millimetres (mm)
1435.56355.6
1640.64406.4
1845.72457.2
2050.80508.0
2255.88558.8
2460.96609.6
2871.12711.2
3076.20762.0
3281.28812.8
3691.44914.4

02 / Your everyday fit

Rings

Measure straight across the inside of a well-fitting ring for the same finger, excluding the metal edges. A jeweller or a physical ring sizer gives a more reliable fit than a ruler. Check when your hands are warm, later in the day; the ring should pass over your knuckle and sit comfortably.

US uses numbers and UK uses letters. EU sizes approximate the inside circumference in millimetres. Equivalents vary slightly between charts; wider bands can feel tighter. Send your sizing system with your size, including any half size, so we can confirm the fit.

Ring sizes — approximate equivalents
USUKEU ≈ circumference mmInside diameter mmInside diameter cmInside diameter inches
34414.11.410.555
44714.91.490.587
54915.71.570.618
65216.51.650.650
75417.31.730.681
85718.11.810.713
96019.01.900.748
106219.81.980.780
116520.62.060.811
126721.42.140.843

Whole US sizes are shown for a compact reference. Ask us about half sizes or sizes outside this range. Measurements on this screen are not life-size templates.

03 / Room to move

Bracelets

Wrap a flexible measuring tape around your wrist where you will wear the bracelet, keeping it close without pulling tight. Tell us this wrist measurement and whether you prefer a close, comfortable or loose fit. We will confirm the extra room needed for the design and clasp.

You can also measure a well-fitting bracelet laid flat from end to end, including the clasp. The table below converts finished bracelet length; it does not automatically add a comfort allowance.

Finished bracelet length — not wrist measurement
Centimetres (cm)Millimetres (mm)Inches
141405.51
151505.91
161606.30
171706.69
181807.09
191907.48
202007.87
212108.27
222208.66
232309.06

04 / Over the hand

Bangles

For a round bangle that already fits, measure straight across the inside opening, excluding the metal. This is the inside diameter, not the circumference.

A closed bangle must slide over your hand: bring your fingers together, tuck your thumb towards your palm and measure around the widest part of your hand with a flexible tape. Send this measurement so we can help confirm a comfortable opening.

Round bangle inside diameter
Millimetres (mm)Centimetres (cm)Inches
505.01.97
525.22.05
545.42.13
565.62.20
585.82.28
606.02.36
626.22.44
646.42.52
666.62.60
686.82.68
707.02.76

This table is for round bangles. For oval, hinged or open styles, share your wrist measurement and any known inside width and height. US, UK and EU ring sizes do not apply to bracelets or bangles; S/M/L labels vary by maker.

References: Blue Nile ring sizing chart (PDF) for US/UK and diameter references; EU equivalents rounded from diameter × π. Fit guidance also informed by Pandora bracelet sizing. Final sizing is confirmed for your chosen design.