Two reliable ways to do it at home: wrap a thin strip of paper around the base of the finger, mark where it meets and measure that length in millimeters; or lay a ring that already fits on a ruler and read the inside diameter. Both, with a full US conversion table, are on our Size & Fit Guide. Measure in the evening rather than first thing — fingers swell through the day — and if you land between two sizes, take the larger.

We do not offer resizing, so please check your size on our Size & Fit Guide before ordering. If a ring does not fit, you are welcome to return it within 14 days of delivery — email returns@sanajewels.com and, for US orders, we will send you a prepaid return label — and order the right size instead. Return shipping is free on US orders. Eternity rings carry a 30% restocking fee on return.

Yes. Our gold pieces are genuine 10K or 14K gold, and our silver pieces are 925 sterling silver. Some sterling silver pieces are gold-plated or rhodium-plated, and a small number combine sterling silver with 18K gold. The metal and karat are stated on every product page, which also says so where a piece is plated. All pieces are stamped with the corresponding metal marking.

In time, yes. Silver reacts with sulfur present in ordinary air, and the darkening that follows is chemistry rather than a fault or a defect. A soft dry cloth lifts it. Storing the piece in a closed pouch away from humidity slows it down, and rhodium plating, where a piece carries it, slows it further still.

Yes. Every Sana Jewels piece is covered against manufacturing defects from the date of delivery, and a missing stone is replaced free under the same warranty. It is valid in the USA only, and any repair performed by another jeweler will void it. The full terms, including the coverage period and the limits on stone size, are in our Return & Refund Policy.