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6296 Donnelly Plaza
Ratkeville, Bahamas.
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Jewelry Size Guide
International Ring Size Conversion Chart & Manufacturing Standards
We utilize highly calibrated steel mandrels to ensure our production aligns perfectly with international standards. Below is the exact conversion chart our CNC engineers use to convert US sizes to UK, EU, and Asian metric sizes.
Standard Necklace Length Guide for Retail Collections
The drape of a necklace defines its style. Here are the global retail standards we manufacture, designed to help you curate the perfect layering collection.
Securing the Fit: Bracelet Sizing Guide
Wristwear requires the perfect balance between security and movement. We engineer our bracelets to accommodate standard wrist anatomies comfortably.”
Ultimate Body Jewelry Size Guide & Manufacturing Gauges
In body modification, sizing is a matter of anatomy and safety, not just aesthetics. A discrepancy of 0.2mm can cause tissue rejection. We adhere strictly to APP (Association of Professional Piercers) standards. Use our professional piercing jewelry size guide below to plan your studio’s inventory or brand’s next collection.
| Piercing Type | Standard Gauge | MM Equivalent | Standard Length/Diameter |
| Navel / Belly | 14G | 1.6mm | 10mm (3/8″) |
| Nose Studs | 20G / 18G | 0.8mm / 1.0mm | 6mm (1/4″) |
| Ear Cartilage | 16G | 1.2mm | 6mm – 8mm |
| Ear Lobes | 20G | 0.8mm | 6mm |
| Ear Tunnels | 8G to 2 Inch | 3.0mm to 50mm+ | Wearable area: 8mm – 10mm |
Why Brands Trust Our Sizing Accuracy
A size chart is useless without the manufacturing capability to execute it accurately. We treat sizing as a strict engineering parameter, completely eliminating the ‘size discrepancy’ issues common with lower-tier factories.
Unlike cast rings that shrink unpredictably during cooling, our rings are CNC-machined from solid steel tubes, guaranteeing a tolerance of +/- 0.05mm.
Caliper QC Protocol
Every batch is physically inspected using digital calipers. We measure internal diameter, wall thickness, and chain length before any shipment leaves our facility.
Comfort Fit Engineering
We don’t just hit the diameter mark; we engineer the inner edge of our rings with a smooth ‘Comfort Fit’ curve, making the jewelry feel custom-made for the wearer.
Standardized Sizing Mandrels
Our quality control team uses standardized, ISO-calibrated steel mandrels to verify final ring sizes post-polishing.”
FAQ for Manufacturing Sizing
To maintain machine calibration and consistent quality, our MOQ is 50 pieces per size (e.g., 50pcs of Size 7, 50pcs of Size 8).
Yes. Since we use CNC machining, we can easily produce half sizes (e.g., US 7.5) or custom ear gauge odd sizes (e.g., 7mm, 9mm) upon request.
Our standard PVD plating is between 0.5 to 2.5 microns thick. This micro-layer is so thin that it does not alter the functional inner diameter of the ring.
We maintain a strict ring sizing tolerance of +/- 0.05mm. Unlike traditional lost-wax casting which can experience unpredictable thermal shrinkage during the cooling phase, we use CNC lathe machining for our stainless steel rings. This ensures the exact inner diameter is achieved every single time.
Absolutely. A comfort fit ring features a slightly domed interior rather than a flat one, making it slide over the knuckle easily. We engineer the inner curve of our bands to provide this ergonomic fit, which is especially popular for men’s heavy bands and wedding rings.
We strictly follow the ISO 8653:2016 standard for international ring sizing. When you submit a tech pack using UK letters (e.g., Size N) or EU metric circumferences (e.g., 54), our engineers accurately map it to our standardized steel mandrels to ensure perfect regional compliance.
The most universal standard necklace lengths for retail are 16 inches (40cm – Choker) and 18 inches (45cm – Princess). To maximize your inventory efficiency, we highly recommend adding a 2-inch (5cm) adjustable chain extender to all necklaces, enabling a single SKU to accommodate multiple customer preferences.
For chain and beaded bracelets, the standard women’s length is 17cm-19cm (6.5″-7.5″), while the men’s standard is 19cm-21cm (7.5″-8.5″). For rigid cuff bangles, we heat-temper the 316L steel to allow slight manual adjustment by the wearer, creating a “One Size Fits Most” solution.
Yes, safety and fit are paramount in body modification. We manufacture body jewelry strictly in accordance with the APP (Association of Professional Piercers) gauge standards. For instance, our belly rings are exactly 14G (1.6mm), and our standard nose/ear studs are 20G (0.8mm) or 18G (1.0mm).
Dead stock is the enemy of startups. For the US women’s market, we recommend focusing your initial inventory on the “Golden Ratio” of sizes: US 6, 7, and 8 (with Size 7 typically being the best-seller). We are happy to share market-specific sizing data with our partners to help minimize your inventory risk.
To maintain machine calibration efficiency and consistent CNC quality, our Minimum Order Quantity (MOQ) is 50 pieces per specific size (e.g., 50pcs of US Size 7, 50pcs of US Size 8). This applies to each design and plating color variation.
Yes. Because we utilize CNC machining rather than relying solely on pre-existing silicone molds, we can easily program our equipment to produce custom jewelry half sizes (e.g., US 7.5) or specific European metric sizes to meet your precise regional demands, without charging extra mold fees.
Extremely accurate. Unlike cast jewelry which shrinks, our CNC-machined ear tunnels strictly follow our internal body jewelry size guide. We maintain a tolerance of +/- 0.05mm for all gauges, ensuring your large scale plugs (e.g., 1 inch / 25.4mm) fit the earlobe safely without causing blowouts.
