Apparel SizeRing Size

US to JP Ring Size for Wide Band Fit

Snapshot

8.5 US ring size equals 7.7 JP ring size.

  • Reference basis: This result uses the selected selected fit profile mapping as the profile basis.
  • Example: For 6.5 US ring size, the selected fit profile mapping returns 5.8 JP ring size under the same fit assumptions.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

7.7 JP value

Switch

API and AI agent access

US to JP Ring Size for Wide Band Fit. fit: wide-band-fit.

Machine-readable identifiers

Conversion family
ring-size
Source unit
us
Target unit
jp
Fit
wide-band-fit

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "ring-size",
  "value": 8.5,
  "from": "us",
  "to": "jp",
  "parameters": {
    "fit": "wide-band-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "ring-size",
    "value": 8.5,
    "from": "us",
    "to": "jp",
    "result": {
      "raw": 7.7108490566,
      "display": "7.7"
    },
    "canonicalPath": "/apparel-size/ring-size/us-to-jp-for-wide-band-fit/"
  }
}
API, OpenAPI and WebMCP documentation

Explanation

US converts to JP using inner ring diameter in millimeters. Fit profile: Wide Band Fit.

Model estimate based on inner ring diameter, not a fit guarantee. No manufacturer chart is established for this model; compare your measurement with the brand’s chart.

Method & Size Mapping

  • Model basis: output depends on the selected fit profile and follows the same fit mapping in both directions.
  • Profile reference: selected fit profile.
  • Consistency rule: calculator output and table values keep the same fit profile in both directions.

Common Conversion Values

US valueJP value
6 1/2 5.8
7 1/2 6.8
8 1/2 7.7
9 1/2 8.7
10 1/2 9.6