Ring Size Guide
Finding the perfect fit for your Ceylon gemstone ring
At Ceylon Gem Vault, we want every ring to feel as precious as the gemstone it carries. Getting your ring size right ensures lasting comfort and security – whether you’re choosing a sapphire solitaire, a ruby cocktail ring, or a timeless engagement piece.
How to Find Your Ring Size
There are two simple methods you can use from the comfort of home.
Method 1 - Measure Your Finger
Place a ring that fits you well on a flat surface. Using a ruler, measure the inner diameter across the widest point in millimeters. Match to the chart below for your size. Even a few millimeters make a difference – so measure carefully.
Step 1: Wrap a thin strip of paper around the base of your finger, leaving enough room to slide comfortably over your knuckle.
Step 2: Mark where the paper meets and measure the length in millimeters with a ruler. This is your finger’s circumference.
Step 3: Match your measurement to the size chart below. If you fall between two sizes, always choose the larger size.
Method 2 - Measure an Existing Ring
Place a ring that fits you well on a flat surface. Using a ruler, measure the inner diameter across the widest point in millimeters. Match to the chart below for your size. Even a few millimeters make a difference – so measure carefully.
International Ring Size Chart
Diameter (mm) | Circumference (mm) | EU/DK | US | UK/AU | Japan |
14.7 mm | 46 mm | 46 | 3¾ | G | 6 |
15.0 mm | 47 mm | 47 | 4 | H | 7 |
15.3 mm | 48 mm | 48 | 4½ | I | 8 |
15.6 mm | 49 mm | 49 | 5 | J | 9 |
15.9 mm | 50 mm | 50 | 5¼ | J½ | 10 |
16.2 mm | 51 mm | 51 | 5¾ | K | 11 |
16.5 mm | 52 mm | 52 | 6 | L | 12 |
16.9 mm | 53 mm | 53 | 6¼ | M | 13 |
17.3 mm | 54 mm | 54 | 7 | N | 14 |
17.5 mm | 55 mm | 55 | 7¼ | N½ | 15 |
17.8 mm | 56 mm | 56 | 7½ | O | 16 |
18.2 mm | 57 mm | 57 | 8 | P | 16½ |
18.6 mm | 58 mm | 58 | 8½ | Q | 17 |
18.8 mm | 59 mm | 59 | 8¾ | R | 18 |
19.1 mm | 60 mm | 60 | 9 | R½ | 18½ |
19.4 mm | 61 mm | 61 | 9½ | S | 19 |
19.8 mm | 62 mm | 62 | 10 | T | 20 |
Ring Sizing Tips
Fingers change throughout the day. Measure in the evening when fingers are at their largest. Cold weather shrinks fingers; heat and humidity can cause slight swelling.
Your dominant hand runs slightly larger. Always measure the specific finger you plan to wear the ring on.
Wide bands fit tighter. For rings wider than 6mm, go half a size up for comfort.
Between sizes? Size up. It’s always easier to resize slightly down than to stretch a ring.
Sizing by Ring Type
Engagement & Wedding Rings – These forever pieces deserve the most precise measurement. Visit our specialists for professional sizing before your purchase.
Cocktail & Gemstone Rings – Measure the specific finger you plan to wear the ring on, as sizes vary by finger.
Stacking Rings – Go for a snug, comfortable fit. Slim bands can be sized slightly smaller.
Knuckle Rings – Size up by half a size to ensure it passes comfortably over the knuckle.
Adjustable Rings – Great for gifting when you’re unsure of size. Our specialists can advise on the best options.
Buying a Ring as a Gift?
Surprising someone special? Borrow a ring they already wear and bring it to our store – our specialists will measure it precisely. Alternatively, reach out to our team for discreet guidance on flexible ring styles perfect for gifting.
Still Unsure? We're Here to Help
Visit Ceylon Gem Vault location and our gemstone specialists will measure your finger using a professional ring sizer – the most accurate method available. We also offer professional resizing services for all Ceylon Gem Vault rings.
Our specialists guide with expertise, not pressure. No commission, no hard-selling – just genuine passion for helping you find the perfect piece.
Ceylon Gem Vault – Where the world comes for Ceylon’s finest.