Jewelry sizing: the ring problem
Rings are the most sizing-sensitive accessory in this category. A ring that is one size too small cannot be worn; one that is too large slides off. Unlike clothing, there is no wearing-in period that adjusts the fit. Getting the size right before ordering is essential, and it requires a different measurement method than clothing.
Ring sizes in Chinese marketplace listings are almost always given in either circumference (in millimetres) or diameter (in millimetres), sometimes with a Chinese size number that maps to these measurements. US ring sizes and EU sizes use different scales, and the same "size 7" means different things in different systems.
The most reliable method is to measure your own finger. Wrap a thin strip of paper around the finger you intend to wear the ring on at its widest point — usually just below the knuckle in the morning, when fingers are slightly swollen. Mark where the paper overlaps, measure the length and that is your circumference in millimetres. Divide by pi (3.14159) for the diameter. Compare these numbers against the listing's size chart, not against a US or EU letter size table. The circumference measurement is the one that translates directly.
Metal quality and plating
Jewelry sold on Chinese marketplace platforms at accessible prices is almost always plated — a base metal (usually brass or zinc alloy) coated with gold, silver, rose gold or other finishes. Solid gold or solid silver at low prices is extremely rare and should be treated as a claim requiring strong evidence.
The quality of plating is measured in microns of plating thickness. Thicker plating lasts longer before the base metal shows through. Cheap plating fades within months; better plating lasts a year or more with care. Listing descriptions rarely state plating thickness, so the best proxy is price and the overall quality of the listing.
In QC photos, look at any edges or points on the jewelry. Plating fails at high-contact, high-wear points first. A ring with clean plating at the shank edges and a necklace with clean plating at the clasp are signs of reasonable quality. Visible base metal showing through at the photo stage means the plating is already thin or poorly applied.
Stone setting quality
Stones — cubic zirconia, crystals or synthetic stones — are used in many jewelry listings. The setting method determines how long the stones stay in place. Prong settings grip the stone at multiple points and are the most secure for faceted stones. Glued settings hold the stone with adhesive and fail with heat, moisture or impact. Bezel settings surround the stone with a metal rim and are secure but hide more of the stone.
For any jewelry with stones, ask for a close-up photo that shows the setting clearly. All stones should be level with each other, fully seated in their settings with no gaps, and the setting metal should not be rough or sharp at the edges. A missing stone in the QC photo is an obvious problem; an unevenly seated stone is subtler but equally worth addressing before shipping.
Necklace chains and clasps
Necklace chains come in many link styles — cable, box, figaro, rope, snake — and the quality of each link's construction determines how the chain hangs and how long it lasts. In photos, look for even link spacing, consistent plating across the full chain length and no links that are clearly wider or narrower than their neighbors.
The clasp is the mechanical element of a necklace. A lobster clasp should open with positive resistance and close securely. A spring ring clasp should close cleanly with the ring fully engaging. A toggle clasp should grip the T-bar without slipping. Ask for the clasp to be photographed open and closed in QC if the necklace has a significant value.
Statement jewelry versus delicate jewelry
Statement jewelry — large, visually prominent pieces designed for a specific outfit — is more forgiving of construction variation than delicate everyday jewelry. A bold chain worn occasionally survives light plating better than a thin chain worn daily. A cocktail ring with a large crystal is assessed on the visual impression; a plain band ring is assessed on finish precision.
Buy for the use case. If you want an everyday piece, prioritize a listing that emphasizes durability, plating thickness and base metal quality. If you want a statement piece for occasional wear, the visual impact of the listing photos matters more.