Ring Size Converter API
Ring Size Converter is a tool for converting ring sizes between US, UK, EU, JP, CH, and AU standards. It can also convert from diameter measurements in millimeters.
The Ring Size Converter API provides reliable and fast access to ring size converter data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.
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/ringsizeconverterCode Examples
Here are examples of 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)const https = require('https');
const url = require('url');
const options = {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
};
const req = https.request('https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us', options, (res) => {
let data = '';
res.on('data', (chunk) => data += chunk);
res.on('end', () => console.log(JSON.parse(data)));
});
req.end();<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'X-API-Key: your_api_key_here',
'Content-Type: application/json'
]);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);
print_r($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))
}require 'net/http'
require 'json'
uri = URI('https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'
response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
using var client = new HttpClient();
client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");
var response = await client.GetAsync("https://api.apiverve.com/v1/ringsizeconverter?size=7&from=us");
response.EnsureSuccessStatusCode();
var responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseBody);
}
}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_hereInteractive 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:
Option 1: Convert by Ring Size
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
size | string | required | The ring size to convert | - | |
from | string | required | Source region Supported values: usukeujpch | - |
Option 2: Convert from Diameter
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
measurement | number | required | Ring diameter in millimeters | - |
Response
The Ring Size Converter API returns responses in JSON, XML, YAML, and CSV formats:
Example Responses
{
"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."
}
}<?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.
| key | value |
|---|---|
| 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:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value | Description |
|---|---|---|---|
input_diameter_mm | number | - | |
circumference_mm | number | - | |
conversions | object | - | |
â”” diameter_mm | number | - | |
â”” circumference_mm | number | - | |
â”” us | number | - | |
â”” uk | string | - | |
â”” eu | number | - | |
â”” jp | number | - | |
â”” ch | number | - | |
â”” au | string | - | |
note | string | - |
Headers
Required and optional headers for Ring Size Converter API requests:
| Header Name | Required | Example Value | Description |
|---|---|---|---|
X-API-Key | required | your_api_key_here | Your APIVerve API key. Found in your dashboard under API Keys. |
Accept | optional | application/json | Specify response format: application/json (default), application/xml, or application/yaml |
User-Agent | optional | MyApp/1.0 | Identifies your application for analytics and debugging purposes |
X-Request-ID | optional | req_123456789 | Custom request identifier for tracking and debugging requests |
Cache-Control | optional | no-cache | Control caching behavior for the request and response |
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/graphqlquery {
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 supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Ring Size Converter directly from browser-based applications without proxy servers.
| CORS Header | Value | Description |
|---|---|---|
Access-Control-Allow-Origin | * | Accepts requests from any origin |
Access-Control-Allow-Methods | * | Accepts any HTTP method |
Access-Control-Allow-Headers | * | Accepts any request headers |
Browser Usage: You can call Ring Size Converter directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.
Rate Limiting
Ring Size Converter API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Ring Size Converter users.
| Plan | Rate Limit | Description |
|---|---|---|
| Free | 5 requests/min | Hard rate limit enforced - exceeding will return 429 errors |
| Starter | No Limit | Production ready - standard traffic priority |
| Pro | No Limit | Production ready - preferred traffic priority |
| Mega | No Limit | Production ready - highest traffic priority |
Learn more about rate limiting →
Rate Limit Headers
When rate limits apply, each Ring Size Converter response includes headers to help you track your usage:
| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum number of requests allowed per time window |
X-RateLimit-Remaining | Number of requests remaining in the current window |
X-RateLimit-Reset | Unix timestamp when the rate limit window resets |
Handling Rate Limits
Free Plan: When you exceed your rate limit, Ring Size Converter returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.
Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.
Best Practices for Ring Size Converter:
- Monitor the rate limit headers to track your Ring Size Converter usage (Free plan only)
- Cache ring size converter responses where appropriate to reduce API calls
- Upgrade to Pro or Mega for guaranteed no-throttle Ring Size Converter performance
Note: Ring Size Converter rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Ring Size Converter on Free tier.
Error Codes
The Ring Size Converter API uses standard HTTP status codes to indicate success or failure:
| Code | Message | Description | Solution |
|---|---|---|---|
200 | OK | Request successful, data returned | No action needed - request was successful |
400 | Bad Request | Invalid request parameters or malformed request | Check required parameters and ensure values match expected formats |
401 | Unauthorized | Missing or invalid API key | Include x-api-key header with valid API key from dashboard |
403 | Forbidden | API key lacks permission or insufficient credits | Check credit balance in dashboard or upgrade plan |
429 | Too Many Requests | Rate limit exceeded (Free: 5 req/min) | Implement request throttling or upgrade to paid plan |
500 | Internal Server Error | Server error occurred | Retry request after a few seconds, contact support if persists |
503 | Service Unavailable | API temporarily unavailable | Wait and retry, check status page for maintenance updates |
Learn more about error handling →
Need help? Contact support with your X-Request-ID for assistance.
Integrate Ring Size Converter with SDKs
Get started quickly with official Ring Size Converter SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.
Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.
Integrate Ring Size Converter with No-Code API Tools
Connect the Ring Size Converter API to your favorite automation platform without writing code. Build workflows that leverage ring size converter data across thousands of apps.





All platforms use your same API key to access Ring Size Converter. Visit our integrations hub for step-by-step setup guides.
Frequently Asked Questions
How do I get an API key for Ring Size Converter?
How many credits does Ring Size Converter cost?
Each successful Ring Size Converter API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful ring size converter lookups.
Can I use Ring Size Converter in production?
The free plan is for testing and development only. For production use of Ring Size Converter, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Ring Size Converter from a browser?
What happens if I exceed my Ring Size Converter credit limit?
When you reach your monthly credit limit, Ring Size Converter API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.



