Measure snugly around the wrist or ankle just below the bone, then add half an inch for a piece that moves comfortably or three quarters of an inch if you prefer one that slides. Rigid bangles and tennis bracelets sit closer to the first figure; chains suit the second. The full conversion table is on our Size & Fit Guide.

Yes. Every piece is made in genuine metal — 10K, 14K, or 18K gold, or 925 sterling silver. All pieces are stamped with the corresponding metal marking.

Yes — natural or lab-grown, every diamond is genuine, and the product page says which. Our natural diamonds are certified compliant with the Kimberley Process — the agreement between governments that keeps conflict diamonds out of the legitimate trade. It is worth knowing what that covers and what it does not; we set that out plainly on our Ethical Sourcing page.

Where a weight is stated as a fraction, it describes a range rather than an exact figure, as the FTC requires. The applicable ranges are shown on this page beside the carat weight, and in full in our FAQ. Your piece will fall within the range shown.

Natural diamonds form over billions of years beneath the earth; lab-grown diamonds are created in a controlled environment. They are chemically, physically and optically identical — the two cannot be told apart by eye, only by instrument. What differs is rarity and price, and we state which is which on every product page.

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.