Finding your perfect ring size shouldn't be guesswork. Whether you're shopping for an engagement ring, wedding band, or everyday jewellery, our comprehensive ring sizing guide ensures you get the perfect fit every time. Trusted by thousands of Australian customers since 1990, this professional guide combines expert jeweller techniques with easy at-home methods.
How to measure ring size at home
String or paper method
Pro Tip: Measure at room temperature when your fingers are at normal size, not when cold or swollen.
What You'll Need
Thin string or strip of paper (3mm wide)
Ruler with millimeter markings
Pen or marker
Step 1
Cut a strip of paper or string approximately 10cm long
Step 2
Wrap around finger at the base where your ring will sit, then mark the overlap where the string/paper meets with a pen
Step 3
Lay flat and measure the marked length in millimetres using a ruler. Find your size using our conversion chart below
Existing ring method
If you have a ring that fits well:
- Place your ring on the printable chart
- Align the inner edge with the circles
- Note the size that fits perfectly
Drag to view example
Circumference to Ring Size Conversion
Australian Ring Size Chart
| Ring Size (AU) | Circumference (mm) | Diameter (mm) | US Size | UK Size |
|---|---|---|---|---|
| H | 48.7 | 15.5 | 4 | H |
| I | 49.3 | 15.7 | 4.25 | I |
| J | 50.0 | 15.9 | 4.5 | J |
| K | 50.6 | 16.1 | 4.75 | K |
| L | 51.2 | 16.3 | 5 | L |
| M | 51.9 | 16.5 | 5.25 | M |
| N | 52.5 | 16.7 | 5.5 | N |
| O | 53.1 | 16.9 | 5.75 | O |
| P | 53.8 | 17.1 | 6 | P |
| Q | 54.4 | 17.3 | 6.25 | Q |
| R | 55.1 | 17.5 | 6.5 | R |
| S | 55.7 | 17.7 | 6.75 | S |
| T | 56.3 | 17.9 | 7 | T |
| U | 57.0 | 18.1 | 7.25 | U |
| V | 57.6 | 18.3 | 7.5 | V |
| W | 58.3 | 18.5 | 7.75 | W |
| X | 58.9 | 18.7 | 8 | X |
| Y | 59.5 | 18.9 | 8.25 | Y |
| Z | 60.2 | 19.1 | 8.5 | Z |
Free Resources
Download Free Printable Ring Size Chart
What's Included:
- Accurate sizing circles for testing existing rings
- Measurement strips for finger circumference
- Conversion tables for international sizes
- Professional tips for accurate measuring
Format: High-resolution PDF, prints perfectly on standard A4 paper
Accuracy Guarantee: Professional jeweller measurements
Tips
Professional ring sizing tips from expert jewelers
Measure time
- Ideal time: Late afternoon when fingers are at normal temperature
- Avoid: Early morning (fingers smaller) or evening after hot day (swollen)
Ring style
Wide Bands (5mm+)
- Size up 0.25-0.5 sizes for comfort
- Wide bands feel tighter than thin bands
Thin Bands (2-3mm)
- True to size or even 0.25 smaller
- Should not spin excessively on finger
Expert tips
Measuring when fingers are cold
Mistake: Cold fingers shrink up to 0.5 sizes smaller.
Solution: Measure at room temperature, ideally in the afternoon
Not accounting for knuckle size
Mistake: Ring must fit over knuckle but sit comfortably at base.
Solution: If knuckle is significantly larger, size up by 0.25-0.5 sizes
Need help?
Frequently Asked Questions
Ring Sizes
When done correctly, at-home sizing using our string method is accurate within 0.25 sizes. For expensive pieces like engagement rings, we recommend professional verification.
Yes, fingers can change size due to:
- Age: Typically increase 0.25-0.5 sizes per decade after 40
- Weight changes: Significant weight loss/gain affects finger size
- Seasonal changes: Fingers swell in heat, shrink in cold
- For daily wear rings: Choose the larger size for comfort
- For wide bands: Definitely choose the larger size
- For thin bands: Smaller size prevents spinning
Most rings can be resized 1-2 sizes up or down, but:
- Eternity bands: Cannot be resized
- Tungsten/ceramic: Cannot be resized
- Complex settings: May be difficult/expensive to resize
Professional In-Store Sizing
Expert Ring Sizing Services at Mezi Stores
Since 1990, Mezi has been Australia's trusted jewelry expert, specializing in hypoallergenic, Australian-designed pieces. Our family-run business combines traditional craftsmanship with modern techniques, ensuring every customer finds their perfect fit.
Bondi Beach Store
- Address: 81 Gould Street, Bondi Beach NSW 2026
- Phone: 0414 688 992
- Hours: 10am-5pm, 7 days a week
Sydney City Store
- Address: Shop/2002 Pitt St, Sydney NSW 2000
- Phone: 0404 875 111
- Hours: 10am-6pm daily
Warringah Mall Store:
- Address: Shop 1205/1 Condamine St, Brookvale NSW 2100
- Phone: 0410 480 897
- Hours: 10am-5pm daily
Personal attention
Australian expertise with 35+ years of local jewellery knowledge
Hypoallergenic
All rings are nickel-free, minimise allergens and suit sensitive skin.
Free resizing
On all ring products within 60 days of purchase
Featured collection
Explore our collection of Rings
About
Our Designs
Mezi is designed in Australia and handcrafted by artisans all over the world, including Turkey, Morocco and India, reflecting the authenticity behind the brand.
About
Our Materials
Each piece is created with quality and attentiveness, allowing each wearer to relate to a certain feeling of empowerment and reflection. The attentiveness and quality are drawn from a love and respect for the people closest to us, who make our dreams a reality and provide a constant source of inspiration.
Contact Our Sizing Experts
📞 Phone:
Bondi Beach: 0414 688 992
Sydney City: 0404 875 111
Warringah Mall: 0410 480 897