Round Brilliant Diamond U-Prong Half Eternity Ring

Traditionally, an engagement ring or a wedding ring is worn on the fourth finger of the left hand, often referred to as the "ring finger." This custom dates back to the ancient belief that a vein in this finger—the "vena amoris" or vein of love — ran directly to the heart.

Of course, traditions can vary by culture and personal preference. Some people choose to wear it on their right hand, especially in different parts of Europe or for practical reasons. There’s no wrong choice — it’s about what feels right for you.

If you're unsure about your ring size, we recommend starting with our Ring Size Guide — a helpful resource covering sizing tips, measurement methods, and resizing information. It’s designed to give you confidence when choosing the perfect fit, whether you're buying for yourself or as a gift.

Yes — our Try-On Kit lets you explore different stone shapes and sizes from the comfort of home. It’s a simple, pressure-free way to get a feel for proportions, style preferences, and sizing before making your final decision. You can easily order your kit online, and we’ll deliver it directly to your door.

We offer one complimentary resizing within 90 days of collection or delivery for all eligible Keanis rings. We understand that sizing can be tricky — especially if it’s for a surprise proposal — so you're welcome to visit us after the big moment for a professional fit and adjustment.

Please note that resizing is only available for rings made in 18K gold or platinum and typically within three full sizes up or down. Some styles, such as full eternity bands or open bands cannot be resized due to their design. If a ring is non-resizable, we’ll clearly note this on the product page.