International Ring Size Chart: US, UK, EU Conversion Guide

A US size 7 ring is a UK/Australian N½, an EU 54, and a Japanese 14 — all describing the same 17.3 mm inside diameter and 54.4 mm inner circumference. This international ring size conversion chart gives wholesale jewelry buyers the full US, UK, EU, JP and AU reference in one place, along with chain length, bracelet, bangle, anklet and body-jewelry gauge sizing. It is written as a working reference: bookmark it, copy the tables into your own store’s size guide, and use the regional assortment section to decide which sizes to actually stock. Every measurement below matches how Bali Silver Export, a wholesale Bali silver jewelry supplier in Celuk Village, specifies sizes on production sheets and in the wholesale catalog and price list.

International Ring Size Conversion Chart (US, UK, EU, JP, AU)

The table below converts ring sizes across the five major systems: US/Canada (numeric), UK/Australia/NZ (letters), EU/ISO 8653 (inner circumference in mm), and Japan (numeric). The two universal columns — inside diameter and inside circumference in millimetres — are the ones that matter most in wholesale, because they are unambiguous across every market. When in doubt, always specify the millimetre value.

Three practical notes on this ring size chart for US, UK and EU buyers. First, the EU/ISO system simply equals the inner circumference in millimetres — an EU 54 is 54 mm around — which is why most factories, including ours, treat it as the engineering standard. Second, UK and Australian sizes are identical letter scales, so one column covers both markets. Third, Japanese sizes are whole numbers only; there is no JP half size, which affects how you build assortments for that market (more on this below). Our wholesale silver rings are made in any size on this chart, including half and quarter sizes, because each piece is finished on a calibrated steel mandrel.

How to Measure Ring Size Accurately

The most reliable method is to measure the inside diameter of a well-fitting ring with digital calipers, then match it to the chart above — accurate to about 0.1 mm. Ring sizers (plastic or metal finger gauges) are the next best option; string and paper-strip methods are the least reliable, typically off by a half size or more because soft materials stretch and compress.

Three measuring methods, ranked

1. Caliper on an existing ring (±0.1 mm): measure the widest inside distance, avoiding any inner engraving ridge. 2. Finger gauge set (±0.25 size): a $10–15 set of 26 steel sizers covers US 1–13. 3. String or paper strip (±0.5 size): wrap at the base of the finger, mark the overlap, measure in mm against the circumference column. Fingers also swell 0.5–1 size during the day and in hot weather, so professional jewelers measure at room temperature in the afternoon.

Band width changes fit

A wide band wears tighter than a thin one on the same finger. The standard trade rule: for bands 6 mm and wider, go up half a size; for 8 mm+ statement bands, a full size up is common. This matters for Balinese jewelry specifically, because carved and filigree statement rings — a signature of Bali filigree work — often run 8–14 mm wide. When retailers order wide designs from us without a note, our QC team flags the order and confirms whether the stated sizes already account for width.

Necklace Chain Length Guide (16–24 Inches and Beyond)

The default wholesale chain length is 18 inches (45.7 cm) for women’s pendants and 20–22 inches (50.8–55.9 cm) for men’s — these two lengths typically account for the majority of reorders we see across markets. Use this chain length guide for wholesale necklaces to decide your length mix:

Two supplier-side details worth knowing. First, a 5 cm (2-inch) extender chain solves most length complaints at retail for pennies per unit — we add extenders on request at production. Second, pendant necklaces are measured chain-only; the drop of the pendant itself (often 20–40 mm on Balinese designs) changes the visual sitting point, so a large pendant on an 18-inch chain reads like a 20-inch look. Full length options per design are listed against every wholesale silver necklace style in our line sheets.

Bracelet and Bangle Sizing Guide (Plus Anklets)

Standard women’s bracelets run 17–19 cm (6.7–7.5 in) with 18 cm as the global default; men’s run 20–22 cm (7.9–8.7 in); bangles are sized by inside diameter, with 65 mm as the standard women’s medium. This bracelet and bangle sizing guide covers the three formats we produce in Celuk:

Chain and cuff bracelets

Measure the wrist snugly, then add 1.5–2 cm for a comfortable chain-bracelet fit. Typical wholesale runs: women’s S 16.5 cm, M 18 cm, L 19.5 cm; men’s M 20 cm, L 21.5 cm, XL 23 cm. Open cuffs are more forgiving — a 6 cm inner gap fits roughly 80% of adult wrists, which is why cuffs are a low-risk first order for new stores buying wholesale silver bracelets.

Bangles (closed circle)

Bangles must slide over the hand, so the inside diameter is the critical spec: small 60 mm, medium 65 mm, large 70 mm (inner circumference roughly 19 / 20.4 / 22 cm). Around 60–70% of a typical women’s bangle order should be medium 65 mm unless your market data says otherwise. For hinged bangles, specify both diameter and the oval ratio — we produce ovals at approximately 60 × 55 mm as the standard.

Anklets

Women’s anklets run 22–25 cm (8.7–9.8 in); 23 cm plus a 2.5 cm extender is the safest single SKU. Anklet demand is strongly seasonal — northern-hemisphere retailers typically reorder in February–April ahead of summer — so factor the 3–5 business day ready-stock lead time (or 3–4 weeks for custom production) into your buying calendar for silver anklets.

Body Jewelry Gauge Chart (Gauge to Millimetres)

Body jewelry thickness is specified in gauge (g), where a smaller number means thicker wire: 20g is 0.8 mm, and the scale runs down through 18g (1.0 mm), 16g (1.2 mm), 14g (1.6 mm), 12g (2.0 mm), 10g (2.4 mm) and 8g (3.2 mm). If your store carries silver body jewelry, print this gauge chart into your listings:

One material caveat from our workshop: 925 sterling silver is appropriate for healed piercings and earring posts, but most piercers recommend implant-grade materials for fresh piercings. We therefore supply silver ear wires, hoops and threader earrings by the thousand — standard French wires in 20g (0.8 mm) — but advise retailers to market silver body jewelry for healed wear. All wholesale silver earrings ship with nickel-free 925 posts and butterfly or latch backs specified per order.

Regional Ring Size Assortment: US, EU, Japan, Australia

The single biggest sizing mistake wholesale buyers make is ordering a flat size run — equal quantities of every size — when real demand follows a bell curve that peaks differently in each market. A tuned regional ring size assortment for US, EU and Japan markets typically reduces dead stock meaningfully compared with flat runs. Here is the stocking guidance we give buyers, based on the order patterns we see from 15+ countries:

Ring sizes for the Japanese market jewelry buyers should note run roughly 1–1.5 US sizes smaller than Western averages, and Japanese sizes have no half steps — so a US-tuned assortment shipped to Tokyo leaves the top third of the curve unsold. Retailers ordering through our Japan wholesale program get a JP-specific size curve on every ring order by default. US buyers can see the standard American curve applied on the USA wholesale page.

A sample 100-piece US assortment

For a first 100-ring order to a US boutique we typically suggest: size 6 × 15, size 6.5 × 10, size 7 × 20, size 7.5 × 12, size 8 × 15, size 9 × 8, plus a men’s block of size 10 × 12 and size 11 × 8. That covers roughly 90% of walk-in demand while keeping slow tail sizes (below 5, above 12) to special order. At our US$200 ready-stock minimum order, even a small test order can follow a scaled-down version of this curve — and sample sets of 10–20 pieces are available below MOQ if you want to check sizing and finish quality first.

How Sizes Are Specified in Wholesale Orders

In professional wholesale, sizes are specified in millimetres plus one named system — never by system name alone. Our order sheets carry four columns per ring SKU: US size, inside diameter (mm), ISO circumference (mm), and quantity; the millimetre value always wins if there is any conflict. Treat this section as a wholesale jewelry size specification guide you can mirror in your own purchase orders to any supplier.

Here is how the process works at Bali Silver Export. Every design in the downloadable catalog and factory-direct price list lists its available size range and default assortment curve. When your purchase order arrives, production sizes each ring on a calibrated steel mandrel, and QC verifies inside diameter with digital calipers to a ±0.1 mm tolerance — one of the checks handled by our quality control team led by Ni Luh Putu Ayu Kartini. Chains are cut to length ±3 mm, and bangles are checked against go/no-go diameter gauges. As a Juara Holding Group company, we document these tolerances on the inspection sheet that ships with every export carton, so your receiving team can spot-check against the same numbers.

Three ordering rules that prevent 95% of sizing disputes:

1. Always state the system AND the millimetres. “Size 17” means US 17 (a huge 26.4 mm ring) to an American reader and JP 17 (≈US 8) to a Japanese one. Writing “JP 17 / 18.1 mm ID” is unambiguous. 2. State whether wide bands are pre-adjusted. If your size list already accounts for the half-size-up rule on 6 mm+ bands, say so on the PO. 3. Specify assortment curves per market, not per order. If you sell in both the EU and Australia, split the size curve accordingly — UK letter sizes for AU, EU circumference sizes for the continent — and we pack and label each market’s carton separately at no charge.

Sizing also interacts with customization. Under our OEM and private-label program — custom production from US$500 — you can set your own house size range (for example, US 5–12 in quarter sizes) and we build the mandrel plan around it; custom OEM production runs 3–4 weeks. Ready-stock designs ship in 3–5 business days in the standard curves shown above. Full terms, per-gram pricing and size availability per design are in the wholesale price list, and hallmarking rules for your destination market (for instance, UK articles under 7.78 g are typically exempt from compulsory hallmarking as of 2027) are covered in our import guide.

Frequently Asked Questions

What is the most common ring size for women and men?

In Western markets, US 7 (EU 54, UK N½, 17.3 mm inside diameter) is the most common women’s size, and US 10 (EU 62, UK T½, 19.8 mm) the most common men’s size. In Japan the peak shifts smaller: around JP 11–12 (≈US 6) for women and JP 17–18 (≈US 8–8.5) for men.

How do I convert a US ring size to EU?

The EU size is simply the inner circumference in millimetres. Multiply the inside diameter by pi: a US 7 has a 17.3 mm diameter, giving 54.4 mm — EU size 54. As a quick rule, EU ≈ (US size × 2.55) + 36.5, accurate to within half a size across the common range.

Are Australian ring sizes the same as UK sizes?

Yes. Australia and New Zealand use the identical letter-based scale as the UK, so N½ is the same physical size in London, Sydney and Auckland. One conversion column covers all three markets on any US, EU and UK ring size chart for wholesale buying.

Why do Japanese ring sizes run smaller, and how should I order for Japan?

Average hand dimensions in Japan are smaller than Western averages, and the JP scale has whole numbers only — no half sizes. Center your assortment on JP 9–13 for women (≈US 5–6.5) rather than copying a US curve, or order through our Japan program where the JP curve is applied automatically.

Can Bali Silver Export make half sizes and non-standard sizes?

Yes. Because every ring is hand-finished on a calibrated mandrel in Celuk Village, we produce any size from US 3 to 15 including half and quarter sizes, at no surcharge. Oversize men’s rings above US 13 are made to order within the normal 3–4 week custom timeline.

Does band width really change the ring size I should order?

Yes — a wide band displaces more skin and wears tighter. The trade standard is to add half a size for bands 6 mm and wider, and a full size for 8 mm+ designs. Tell your supplier whether your size list is already width-adjusted so production doesn’t double-correct.

What is the minimum order to test sizes before a full assortment?

Ready-stock orders start at US$200 with no per-piece minimum, and sample sets of 10–20 pieces are available below MOQ so you can verify sizing, weight and finish before committing. Ready stock ships in 3–5 business days; custom OEM production starts from US$500 and takes 3–4 weeks.

How are sizes listed in the wholesale catalog?

Every ring in the catalog shows its available US size range plus inside diameter in millimetres, and every chain shows length in both inches and centimetres. Request the current edition from the download page and our export team will include the size-curve template we use for first orders.

Kadek Widiartha is Export Director at Bali Silver Export. Born in Gianyar to a family of Celuk silversmiths, he has spent more than 12 years managing 925 sterling silver exports to boutiques and jewelry brands across 15+ countries.