Jewellery Sizing Guide

Buying jewellery online can feel like a leap of faith - 'what's my ring size', 'what length necklace should I order', and so on. So here’s everything you need to know to choose your necklaces and rings confidently.

 American Dime double coin necklace with silver chain worn by woman with a black top.
 American Dime double coin necklace with silver chain worn by woman with a black top.

Necklace length guide

One of the most common questions I receive is:

“What length should I choose?”

The truth is how a necklace sits on your neckline is a very personal preference. That’s why most Mintique necklaces are available in:

14” – Choker length
16” – Sits at the collarbone
18” – Just below the collarbone (most popular)
20” – Lower neckline

Important note for double coin necklaces

If you choose an 18-inch chain at checkout, that means: 18-inch chain + the width of the pendant. So the total drop will be slightly longer than 18 inches once worn.

How to choose the right length

Option 1 – Use string

Wrap a piece of string around your neck at your desired length. Measure the string with a ruler to find your ideal chain length.

Option 2 – Measure a favourite necklace

Lay a necklace you love flat and measure the full length from clasp to clasp. This is especially useful when buying a gift.

Still unsure?

Choosing jewellery should feel exciting not stressful. If you're hesitating between sizes or buying as a surprise, just get in touch. I’d much rather guide you beforehand than adjust things afterwards.

Necklace length chart for Mintique of Cambridge with a diagram of necklaces on a mannequin.

Ring size guide (UK & US)

I completely understand that ordering a ring online can feel daunting. That’s exactly why I created my Perfect Fit Method – a step-by-step way to help you feel confident in your choice. That said, I do require a ring size at the time of ordering but there are several simple ways to find yours.

Before you measure, a few important notes

  • Fingers change size throughout the day (warmer = slightly larger).
  • Cold weather can temporarily shrink fingers.
  • Wider bands need slightly more room than slim bands.
  • If stacking rings, you may need to go up half a size.
  • Knuckle size matters - the ring should slide over comfortably but not spin excessively.

4 Ways to find your ring size

1. Visit a local jeweller (most accurate)

The easiest and most reliable method is to pop into a high street or independent jeweller and ask to be measured in UK sizing (A–Z+6). If you’re in the US, ask for your US ring size, and use the conversion chart below. This measurement will be pretty accurate but I use Durston tools (the gold standard in ring making) so your jewellers tools may not exactly match (which is why I developed my Perfect Fit Method).

2. Measure an existing ring

If you already own a ring that fits the correct finger:

  • Measure the inside diameter (not the outside).
  • Measure across the widest inner points.
  • Use the chart below to match the diameter to a UK size.

This is especially useful for gifts.

3. Use the wire method

  • Take a thin piece of wire or a straightened paper clip.
  • Form a loop and gently tighten until it fits comfortably over your knuckle.
  • Slide it off and cut the loop open.
  • Flatten and measure the length in millimetres.
  • This measurement gives you your finger circumference, which you can match below.

4. Adjustable belt sizers

These wrap around your finger like a tiny measuring belt. They can give an approximate size, but must stay circular (not squashed) for accuracy. Follow the instructions enclosed with the device carefully.

Please avoid using printable ring charts - printer scales can vary and give inaccurate readings.

What happens after you order?

Every single ring size is personally confirmed before dispatch.

If your ring arrives and the fit isn’t quite right:

  • Contact me within 30 days of delivery
  • Post the ring back with your corrected size
  • I’ll adjust it free of charge

You simply cover return postage to and from me. That’s it. No stress.

UK to US Ring Size Conversion Chart

Half sizes are available when ordering Mintique of Cambridge coin rings. Some rings can be made to Z+4.
UK size US size Inside circumference (mm) Inside diameter (mm)
F 3 44.2 14.1
G 3 1/2 45.5 14.4
H 4 46.8 14.7
I 4 1/2 48.0 15.1
J 4 3/4 48.7 15.5
K 5 1/4 49.8 15.9
L 5 3/4 51.2 16.3
M 6 1/4 52.5 16.7
N 7 53.8 16.9
O 7 1/4 55.0 17.6
P 7 3/4 56.3 17.9
Q 8 1/4 57.3 18.2
R 8 3/4 58.9 18.8
S 9 60.2 19.1
T 9 3/4 61.4 19.6
U 10 1/4 62.7 20.0
V 10 1/2 64.0 20.4
W 11 1/4 64.9 20.8
X 11 3/4 66.1 21.0
Y 12 1/2 67.5 21.5
Z 13 68.5 21.9

Want some more advice about sizing?

Drop me a message with your question - I'm very happy to advise.