A simple guide to finding the perfect fit — for you or someone you love.
The right ring should feel effortless — secure, comfortable, and uniquely yours.
Whether you're choosing a new piece for yourself or searching for a special ring for your someone you love, finding the right size can be simple — even when you're trying to keep it a surprise.
FOR YOURSELF
If you already own a ring that fits perfectly, this is the easiest way to find your size.
Simply measure the inside diameter of the ring — from one inner edge straight across to the opposite inner edge.
Compare your measurement with our guide:
US SIZE
|
EU SIZE
|
INSIDE DIAMETER
|
5
|
49
|
1.57 cm
|
6
|
52
|
1.65 cm
|
7
|
54
|
1.73 cm
|
8
|
57
|
1.81 cm
|
NO RING TO MEASURE?
You can also measure your finger with a thin strip of paper or string.
Wrap it comfortably around the finger where you want to wear your ring, mark where the ends meet and measure the length.
Use this measurement as an indication and, whenever possible, compare it with a ring you already own for a more reliable result.
FOR SOMEONE YOU LOVE
PLANNING A SURPRISE?
If you're a man looking for the perfect ring for your girlfriend, you probably don't want to ask her directly — and you don't have to.
The easiest way to discover her ring size discreetly is to borrow one of her rings.
Choose a ring she wears on the same finger you are buying for and measure its inside diameter.
Then simply compare it with our LUNE size guide.
If you can't access one of her rings, ask someone close to her. A best friend, sister or family member may already know her size — and can help you keep the surprise.
A LITTLE TIP
For the most accurate measurement, make sure the ring you are measuring sits comfortably on the finger.
Remember that different fingers can have different sizes, and the same finger can vary slightly between the left and right hand.
If you're between two sizes, consider the design of the ring. Wider rings can feel slightly more snug than delicate styles.
THE PERFECT FIT
Whether it's a piece you've chosen for yourself or the ring you picked especially for her, we hope it becomes something she never wants to take off.
Find your size. Choose your piece. Make it yours.
LUNE
JEWELLERY WITH INTENTION.
