Struggling to find your correct ring size when shopping internationally? You’re not alone! Many people get confused between UK letter sizes (A–Z) and US number sizes (1–13).
At ANNXMEE, we’ve created this simple, accurate guide to help you easily convert UK to US ring sizes - no guesswork, no wasted returns, just a perfect fit every time.
💍 Why You Need to Convert UK to US Ring Sizes
Ring sizing systems differ around the world:
-
The UK uses letters (A–Z).
-
The US uses numbers (1–13) with half sizes (like 6.5).
-
Europe and Asia use millimeter-based systems.
If you’re ordering a ring from an international jeweler or online boutique, knowing how to convert between these systems ensures your ring fits perfectly the first time.
💡 Quick Tip: Your ring size can change slightly depending on the band width, temperature, and time of day. Measure your finger mid-day for the most accurate fit!
📏 UK to US Ring Size Conversion Table
Below is ANNXMEE’s easy-to-read UK to US ring size chart, showing how each UK size corresponds to the US system. We’ve also included approximate circumference (mm) for reference.
| UK Size | US Size | Approx Circumference (mm) |
|---|---|---|
| C | 1¾ | 40.5 |
| D | 2¼ | 41.5 |
| E | 2¾ | 42.8 |
| F | 3¼ | 44.0 |
| G | 3¾ | 45.2 |
| H | 4¼ | 46.5 |
| I | 4¾ | 47.8 |
| J | 5¼ | 49.0 |
| K | 5½ | 50.3 |
| L | 6 | 51.5 |
| M | 6½ | 52.8 |
| N | 7 | 54.0 |
| O | 7½ | 55.3 |
| P | 8 | 56.6 |
| Q | 8½ | 57.8 |
| R | 8¾ | 59.1 |
| S | 9½ | 60.3 |
| T | 9¾ | 61.6 |
| U | 10¼ | 62.8 |
| V | 10¾ | 64.1 |
| W | 11¼ | 65.3 |
| X | 11¾ | 66.6 |
| Y | 12¼ | 67.8 |
| Z | 12¾ | 68.9 |
🪞Pro Tip: If your size falls between two letters, choose the larger size for comfort - especially for thicker ring bands.
📊 UK to US Ring Size Conversion Chart (Visual Data)
Below is a quick chart showing how UK and US ring sizes increase proportionally:
| UK Size (A–Z) | US Size (1–13) |
|---|---|
| A → Z | 0 → 13 |
Visual Trend:
As UK letter sizes move from C → Z, the corresponding US sizes rise from 1¾ → 12¾ in smooth increments.
On a line chart, this appears as a gentle, upward-sloping line - indicating a consistent growth between both sizing systems.
How to Convert Your UK Ring Size to US (Step-by-Step)
-
Find your current UK size (you’ll often find this stamped on an existing ring).
-
Use the ANNXMEE conversion table above to locate the matching US number.
-
Cross-check with a millimeter ruler or a printable size chart for accuracy.
-
Try a ring sizer tool for perfect results (available online or in jewelry stores).
-
Double-check comfort fit: If it’s snug over the knuckle but comfortable at rest, you’ve got it right.
💬 Example:
If your UK size is N, your US size will be 7.
For a thicker band, go for 7.25 for a better fit.
💡 Expert ANNXMEE Tips for Perfect Ring Sizing
-
Measure your finger at room temperature (cold fingers shrink, warm fingers swell).
-
Avoid measuring early morning - fingers may be smaller.
-
For wide bands, go up half a size.
-
Check your size twice for accuracy - once on each hand (dominant hands are often slightly larger).
-
If buying a gift, measure an existing ring from the same finger for best results.
FAQs - Easily Convert UK to US Ring Sizes
Q1: How accurate is the ANNXMEE ring size conversion chart?
A: Extremely accurate for most standard jewelers. However, minor variations exist between brands, so always confirm if precision is critical (like engagement rings).
Q2: Can I measure my ring size at home?
A: Yes! Wrap a thin strip of paper around your finger, mark the overlap, measure in millimeters, and use our chart above to find your UK or US size.
Q3: What if my size falls between two sizes?
A: Choose the larger size for comfort, especially for rings that can’t be resized easily.
Q4: Do men’s and women’s ring sizes differ?
A: The conversion scale is the same, but average ring sizes differ - women usually range between US 5–7, men between US 8–10.5.
Q5: Are UK and US ring sizes the same?
A: No. UK sizes use letters, while US sizes use numbers. That’s why conversion is necessary when shopping internationally.
Q6: What’s the easiest way to get the right size online?
A: Order a free ring sizer (many jewelers, including ANNXMEE partners, offer them), or measure an existing ring that fits perfectly.
✨ Final Thoughts - Get the Perfect Fit Every Time
Whether you’re buying a promise ring, engagement ring, or fashion statement piece, knowing your size in both UK and US systems saves time, money, and stress.
At ANNXMEE, we believe every piece of jewelry should fit like it was made for you. Use this conversion guide as your go-to reference and shop confidently across international stores.
