Ring Size Guide
Accurate Ring Sizing & Fitting Advice in Cork & Ireland
Let’s take the guesswork out of finding your perfect ring size. Whether you’re shopping online across Ireland or booking a consult at our Cork store, our expert tips and ring sizing chart will help you land the ideal fit for your finger – no stress, just confidence.
Ring Sizing Chart & How to Measure
You have two easy options to find your ring size:
1. Measure a Current Ring
- Use a ruler or digital calliper to measure the inside diameter in millimetres (mm).
- Use our ring size chart below to convert mm to the UK/Ireland letter (e.g. M, T) and international equivalents.
2. Measure Your Finger
- Wrap a narrow strip of paper or fine string around the base of the finger where the ring will sit.
- Mark where the ends meet and measure that length in mm (circumference).
- Divide the length of the circumference by 3.14 to get the diameter size.
- For best accuracy, measure later in the day when your fingers are at their normal size (avoiding extreme heat or cold) or contact us to arrange a custom ring fitting in-store with us.
Ring Sizing Chart
| Ring Size (IRE / UK) | Ring Size (US) | Ring Size (EU) | Inside Diameter (MM) |
|---|---|---|---|
| E | 2 1/2 | 42 3/4 | 13.7 |
| E 1/2 | 2 3/4 | 42 3/4 | 13.9 |
| F | 2 7/8 | 44 | 14.1 |
| F 1/2 | 3 | 44 5/8 | 14.3 |
| G | 3 1/4 | 45 1/4 | 14.5 |
| G 1/2 | 3 1/2 | 45 7/8 | 14.7 |
| H | 3 3/4 | 46 1/2 | 14.9 |
| H 1/2 | 4 | 47 1/8 | 15.1 |
| I | 4 1/4 | 47 3/4 | 15.2 |
| I 1/2 | 4 1/2 | 48 | 15.4 |
| J | 4 3/4 | 48 3/4 | 15.6 |
| J 1/2 | 5 | 49 | 15.8 |
| K | 5 1/4 | 49 5/8 | 16 |
| K 1/2 | 5 1/2 | 50 1/4 | 16.1 |
| L | 5 3/4 | 50 7/8 | 16.4 |
| L 1/2 | 6 | 51 1/2 | 16.6 |
| M | 6 1/4 | 52 1/8 | 16.8 |
| M 1/2 | 6 1/2 | 52 3/4 | 17 |
| N | 6 3/4 | 53 3/8 | 17.2 |
| N 1/2 | 7 | 53 1/4 | 17.4 |
| O | 7 1/4 | 54 | 17.6 |
| O 1/2 | 7 1/2 | 54 5/8 | 17.8 |
| P | 7 3/4 | 55 1/4 | 18 |
| P 1/2 | 8 | 55 7/8 | 18.2 |
| Q | 8 1/4 | 56 1/2 | 18.4 |
| Q 1/2 | 8 1/2 | 57 1/8 | 18.6 |
| R | 8 3/4 | 57 3/4 | 18.8 |
| R 1/2 | 9 | 58 3/8 | 19 |
| S | 9 1/4 | 59 | 19.2 |
| S 1/2 | 9 1/2 | 59 5/8 | 19.4 |
| T | 9 3/4 | 60 7/8 | 19.5 |
| T 1/2 | 10 | 61 1/2 | 19.7 |
| U | 10 1/4 | 61 1/8 | 19.9 |
Average Ring Sizes in Ireland
- Women’s average: Most common engagement or wedding ring size for women in Ireland is M (UK/IRE).
- Men’s average: The prevailing men’s ring size in Ireland is T (UK/IRE) — typically around seven letter sizes larger than the average women’s size.
These are averages individual sizing may vary, so always test or verify.
Tips & Advice for Getting the Fit Right for your Engagement & Wedding Ring
If possible, have your ring size measured by a trusted jeweller — they use professional tools and multiple test rings. (At Kennys in Cork, we offer this service, free with an appointment.)
- Fingers swell during the day and shrink when cold – avoid sizing first thing in the morning or right after exercise.
- Wide bands (e.g. 6 mm+) tend to feel tighter; consider going half a size up if you choose a thicker ring.
- If you’re between sizes, lean slightly smaller for comfort (for women) or larger (for men) depending on the design.
- Don’t panic – many rings can be resized after purchase (conditions apply). At Kennys, we offer ring resizing for many styles, often free of charge for first adjustment.
Why Precise Ring Sizing Matters
Choosing the correct ring size ensures comfort, wearability and longevity. An ill-fitting ring can twist, rub, or even get stuck and resizing gem-set styles can be complicated or impossible. With our Cork-based workshop, Kennys offers local support and adjustments for customers across Cork and throughout Ireland.
Why Precise Ring Sizing Matters
Choosing the correct ring size ensures comfort, wearability and longevity. An ill-fitting ring can twist, rub, or even get stuck — and resizing gem-set styles can be complicated or impossible. With our Cork-based workshop, Kennys offers local support and adjustments for customers across Cork and throughout Ireland.
Need Help or Unsure?
• Bring a ring you already own (for the same finger) into our Cork showroom for exact sizing.
• Book a fitting appointment — our expert staff will guide you through ring styles, widths and comfortable fit.
• If you already own a ring that fits, simply send us the inside diameter and we’ll confirm the equivalent Irish/UK size.
Let us help you get the perfect ring fit a small detail that makes a big difference.
Book your ring sizing appointment in Cork today or Explore our ring collections online.