Ring Size Converter API

Overview

To use Ring Size Converter, you need an API key. You can get one by creating a free account and visiting your dashboard.

GET Endpoint

https://api.apiverve.com/v1/ringsizeconverter

Example

How to call the Ring Size Converter API in different programming languages.

curl -X GET \
  "https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us" \
  -H "X-API-Key: your_api_key_here"

const response = await fetch('https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us', headers=headers)

data = response.json()
print(data)

package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

{
  "status": "ok",
  "error": null,
  "data": {
    "input_diameter_mm": 17.3,
    "circumference_mm": 54.3,
    "conversions": {
      "diameter_mm": 17.3,
      "circumference_mm": 54.3,
      "us": 7,
      "uk": "N",
      "eu": 52,
      "jp": 17,
      "ch": -22,
      "au": "N"
    },
    "note": "Sizes are approximate. For accurate sizing, visit a jeweler."
  }
}

Authentication

The Ring Size Converter API requires authentication via API key. Include your API key in the request header:

X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Ring Size Converter API directly in your browser with live requests and responses.

Parameters

The Ring Size Converter API supports multiple query options. Use one of the following:

Response

The Ring Size Converter API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.

Other Response Formats

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <input_diameter_mm>17.3</input_diameter_mm>
    <circumference_mm>54.3</circumference_mm>
    <conversions>
      <diameter_mm>17.3</diameter_mm>
      <circumference_mm>54.3</circumference_mm>
      <us>7</us>
      <uk>N</uk>
      <eu>52</eu>
      <jp>17</jp>
      <ch>-22</ch>
      <au>N</au>
    </conversions>
    <note>Sizes are approximate. For accurate sizing, visit a jeweler.</note>
  </data>
</response>

status: ok
error: null
data:
  input_diameter_mm: 17.3
  circumference_mm: 54.3
  conversions:
    diameter_mm: 17.3
    circumference_mm: 54.3
    us: 7
    uk: 'N'
    eu: 52
    jp: 17
    ch: -22
    au: 'N'
  note: Sizes are approximate. For accurate sizing, visit a jeweler.

Response Structure

All API responses follow a consistent structure with the following fields:

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Headers

Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →

GraphQL AccessALPHA

Access Ring Size Converter through GraphQL to combine it with other API calls in a single request. Query only the ring size converter data you need with precise field selection, and orchestrate complex data fetching workflows.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

POST https://api.apiverve.com/v1/graphql

query {
  ringsizeconverter(
    input: {
      size: "7"
      from: "us"
    }
  ) {
    input_diameter_mm
    circumference_mm
    conversions {
      diameter_mm
      circumference_mm
      us
      uk
      eu
      jp
      ch
      au
    }
    note
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The Ring Size Converter API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →

Rate Limiting

Ring Size Converter requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →

Error Codes

The Ring Size Converter API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →

SDKs for Ring Size Converter

Official Ring Size Converter packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →

JitPack

No-Code Integrations

Ring Size Converter works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →

Zapier

Make

Pipedream

n8n

Power Automate

Frequently Asked Questions

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