We want your made-to-order ring to fit perfectly. Since most rings is adjusted in our studio, getting the size right is the first step. We use standard UK Ring Sizing (Letters A–Z).

How to Find Your Size

Option 1: Professional Measurement (Recommended)
If you are unsure of your size, the most accurate method is to visit a local jeweller to have your finger sized professionally. This is the best way to ensure a perfect fit.

Option 2: Measure an Existing Ring
If you are buying a gift or cannot visit a jeweller, you can measure a ring that currently fits the intended finger well.

1. Select a ring that fits the specific finger you want to wear your new ring on.
2. Place a ruler over the ring and measure the inside diameter (straight across the center).
3. Do not include the metal band itself in the measurement; measure only the empty space.
4. Use the chart below to find your match.

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International Size Conversion Chart

Use this chart to convert your diameter or US/EU size into our standard UK sizing.

UK Size	Inside Diameter	US Size	EU Size
G	14.4 mm	3 ¼	45
H	14.8 mm	3 ¾	46.5
I	15.2 mm	4 ¼	47.5
J	15.6 mm	4 ¾	48.5
K	15.9 mm	5 ¼	50
L	16.3 mm	6	51
M	16.7 mm	6 ¼	52.5
N	17.1 mm	6 ¾	53.5
O	17.5 mm	7	55
P	17.9 mm	7 ½	56
Q	18.3 mm	8	57.5
R	18.8 mm	8 ½	58.5
S	19.2 mm	9	60
T	19.6 mm	9 ½	61
U	20.0 mm	10	62.5

⚠️ Style Note: Sizing for Wide Bands

Specific advice for the Abysse Marine Ring:
While most of our rings fit true to standard sizing, band width plays a major role in how a ring feels. Rings with a wider or sculptural setting cover more surface area on your finger and will feel tighter than a standard delicate band.

Our Recommendation: For these specific styles, we strongly recommend selecting one size larger than your usual measurement for the most comfortable fit.

Tips for the Perfect Fit

• Temperature Matters: Fingers change size throughout the day based on temperature and physical activity. Do not measure your hands when they are cold, as your fingers can be up to half a size smaller. The best time to measure is in the evening when your hands are warmest.
• The Knuckle Test: Your ring should fit comfortably—snug enough that it won't fall off, but loose enough to slide over your knuckle with a little bit of resistance. If your knuckle is significantly larger than the base of your finger, choose a size in between the two measurements.

Custom Sizes

Don't see your size listed? We can often accommodate custom requests. Please email us at hello@epheri.com before placing your order to confirm availability.

Please note: Rings made in a custom size outside of our standard range are non-exchangeable and non-refundable, as they are specially crafted just for you.