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Size Wise

International clothing, shoe and ring size converter — US/UK/EU/Japan, hand-checked against real charts

Unify Dynamics LLC

Documentation
Tools9read-only
Sign-inNoneno account, no key
Data keptNoneprocessed in memory
PriceFreeoptional Pro limits
StatusLiveMCP + REST
Works withMCP · RESTany agent

Try asking

Real questions, and the tools your agent calls to answer them.

What's a men's US 10 shoe in UK sizing?
Tools called
convert_shoe_size
Show me the full women's shoe size chart
Tools called
shoe_size_chart
My foot is 26cm long, what shoe size is that?
Tools called
foot_length_to_shoe_size
What shoe size is a typical 3 year old?
Tools called
kids_shoe_size_by_age
What's a women's US size 8 in UK and EU sizing?
Tools called
convert_clothing_size
Show me the men's shirt size chart
Tools called
clothing_size_chart
What's a US ring size 7 in UK sizing?
Tools called
convert_ring_size
Show me the full ring size chart
Tools called
ring_size_chart
What size conversions can you do?
Tools called
size_systems

About

Sizewise is a fully local, hand-curated international size-conversion reference. convert_shoe_size and shoe_size_chart cover men's, women's and kids' footwear across US/UK/EU/Japan(cm); foot_length_to_shoe_size suggests a size from a measured foot length, and kids_shoe_size_by_age gives a typical range for a child's age in months. convert_clothing_size and clothing_size_chart cover women's clothing (US/UK/EU/Italy/Japan/alpha), men's tops (alpha/US/UK/EU/chest), men's bottoms (US waist inches vs EU waist cm), and kids' clothing (US age sizing vs EU). convert_ring_size and ring_size_chart cover US/UK/EU/Japan ring sizes plus diameter/circumference in mm. size_systems lists every category and system covered. Footwear and ring conversions are fairly standardized industry-wide; clothing sizes vary by brand and cut beyond these generic tables — always check a brand's own chart before buying. Keyless; fully local; zero upstream calls; nothing stored.

Sources: Hand-curated from widely published international shoe, clothing and ring size conversion charts, cross-checked across multiple retailer and jewelry references as of build date; fully local, zero upstream calls

Privacy

The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.

Data not collectedNo account, no profile, no stored prompts or results.
Privacy policyTerms

What it can do

9 tools, grouped by job. Every one is read-only or compute-only.

OpenAPI
Shoe Sizes4 tools
  • Convert shoe sizeConverts one shoe size between US/UK/EU/Japan(cm) for men's, women's or kids' footwear.
  • Shoe size chartThe full US/UK/EU/Japan shoe size conversion table for men's, women's or kids' footwear.
  • Foot length to shoe sizeSuggests the closest shoe size across all systems for a measured foot length in cm.
  • Kids shoe size by ageA typical kids' shoe size for a given age in months (0-144, i.e. up to 12 years).
Clothing Sizes2 tools
  • Convert clothing sizeConverts one clothing size between US/UK/EU/Italy/Japan/alpha (women's), US/UK/EU/alpha/chest (men's tops), US-waist-inches/EU-waist-cm (men's…
  • Clothing size chartThe full clothing size conversion table for one category (womens, mens_tops, mens_bottoms, kids).
Ring Sizes & Overview3 tools
  • Convert ring sizeConverts one ring size between US/UK/EU/Japan and inner diameter/circumference in mm.
  • Ring size chartThe full US/UK/EU/Japan/diameter/circumference ring size conversion table.
  • Size systemsLists every size category (shoes, clothing, rings) and which sizing systems (US, UK, EU, etc.) this reference covers for each.

Information

PublisherUnify Dynamics LLC
CategoryEveryday life · Shopping
LanguagesEnglish
Built forGlobal
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpointhttps://sizewise.connectorbay.com/mcp
REST APIopenapi.json
SupportGet help · Status
CountryWorldwide

Connect it to your agent

Three ways in, the same 9 tools.

MCP (Claude, Cursor, Windsurf, VS Code, any MCP client)https://sizewise.connectorbay.com/mcp
RESTPOST https://sizewise.connectorbay.com/v1/tools/<tool>
OpenAI function callinghttps://connectorbay.com/openai/sizewise.json
OpenAI-compatible chathttps://connectorbay.com/v1/chat/completions · how it works
  • Add the MCP URL in your client's connector, MCP or integration settings (streamable HTTP, no OAuth).
  • Key: none needed.
  • Ask a question; the agent picks the right tool and answers from the live data.

Size Wise connector: questions and answers

What is the Size Wise connector?

Sizewise is a fully local, hand-curated international size-conversion reference. It is a hosted MCP server with 9 tools such as Convert shoe size, Shoe size chart, Foot length to shoe size, Kids shoe size by age, Convert clothing size, Clothing size chart, published by Unify Dynamics LLC. It is independent and not affiliated with Size Wise.

How do I connect Size Wise to Claude, ChatGPT or Cursor?

Add the MCP endpoint https://sizewise.connectorbay.com/mcp to your client's MCP, connector or integration settings (streamable HTTP, no OAuth). For REST, POST JSON to https://sizewise.connectorbay.com/v1/tools/<tool>; the OpenAPI description is at /openapi.json. For OpenAI function calling, load https://connectorbay.com/openai/sizewise.json.

Do I need an account or API key for Size Wise?

No. The connector needs no sign-in and no key. An optional Pro key only raises rate limits.

Is Size Wise read-only?

Yes. Every tool reads or computes. Nothing is created, changed, sent, paid or deleted in your account.

Is the Size Wise connector free?

Yes. It is free to use within the published rate limits; an optional Pro key raises them. There is no account to create.

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Documentation

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What Size Wise is for

"What's a US 9 shoe in UK sizing?", "what's a women's medium in EU numbers?", "my foot is 26cm, what size is that?", "what ring size is a 54mm circumference?" — a hand-curated, cross-checked international size-conversion reference that answers instantly instead of sending you hunting through a retailer's size-chart page.

What it does

convert_shoe_size and shoe_size_chart cover men's, women's and kids' footwear across US/UK/EU/Japan(cm). foot_length_to_shoe_size suggests the closest size across every system from a measured foot length, and kids_shoe_size_by_age gives a typical shoe-size range for a child's age in months. convert_clothing_size and clothing_size_chart cover women's clothing (US/UK/EU/Italy/Japan/alpha), men's tops (alpha/US/UK/EU/chest measurements), men's bottoms (US waist inches vs EU waist cm), and kids' clothing (US age sizing vs EU numeric). convert_ring_size and ring_size_chart cover US/UK/EU/Japan ring sizes plus inner diameter and circumference in millimeters. size_systems lists every category and sizing system this reference covers.

What it is not

Footwear and ring conversions are fairly standardized industry-wide, so those tables are reliable as a general reference. Clothing sizing is not standardized — the same labeled size varies meaningfully by brand, cut and country beyond the generic tables here. Treat every clothing conversion as a starting point, not a guarantee of fit, and check the specific brand's own size chart before buying anything you can't try on or return.

Privacy policy

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Size Wise — Privacy Policy

Effective 25 September 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What Size Wise is. Size Wise is a connector (an MCP server and REST API) that AI assistants and personal agents call on your behalf for an international size-conversion reference — shoe, clothing and ring sizes across US/UK/EU/Japan/Italy, with foot-length and kids'-age helpers. You interact with your assistant; the assistant sends us only the arguments needed for that one lookup.

What we receive. The arguments of each tool call, the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant, and a Pro API key if you have one), and standard server logs.

Everything is answered from a bundled, hand-curated reference file and nothing is stored. No request is forwarded to any third party — there is no upstream call at all, live or otherwise — and no query is logged in request bodies, recorded, or used to train anything.

What we do not receive or store. We do not receive your conversation with the assistant or your name, and we do not build a profile from your queries: each request is answered independently and nothing carries over between requests. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting-provider access logs, which contain IP addresses and request paths but not request bodies, are retained for up to 30 days for security and abuse prevention.

Sub-processors. None — the entire dataset is bundled with the server and answered locally. Hosting: Vercel (United States regions).

Legal bases and your rights. Our processing is necessary to provide the service you request through your assistant. Because we store no personal data beyond short-lived logs, requests to access, correct or delete personal data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. We do not sell or share personal information and do not use your data to train models.

Children. Size Wise is a general-audience service operated by the adult using the assistant.

Changes. We will post changes here with a new effective date.

Terms of service

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Size Wise — Terms of Service

Effective 25 September 2026. These terms govern use of the Size Wise connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

  1. The Service. Size Wise returns an international size-conversion reference — shoe, clothing and ring sizes across US/UK/EU/Japan/Italy, with foot-length and kids'-age helpers. It is accessed through an AI assistant or directly over MCP or HTTP.
  2. General information, not professional advice. Size Wise provides general, hand-curated reference information. It does not know your specific product, purchase, brand, or situation, and it is not a substitute for reading the manufacturer's or retailer's own materials, or for professional advice where relevant.
  3. Reference, not guaranteed-current. Content reflects general, widely published practice as of the build date stated in the Service's own data. Some figures, dates or rules change over time and vary by brand, retailer or region — always verify anything decision-critical against a primary source.
  4. Acceptable use. Automated use within the published rate limits is welcome.
  5. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time.
  6. Data. Our Privacy Policy describes what we process. In short: your query is answered from a bundled reference file, and nothing is stored.
  7. Pro keys. Optional Pro API keys are issued at our discretion, are personal to the holder and may be revoked for abuse.
  8. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss, injury, or damage arising from use of, or reliance on, the Service. Our total liability is limited to US $100.
  9. Governing law. California law; venue in San Mateo County, California.
  10. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/sizewise

Support

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Size Wise support

Email agent@connectorbay.com. We answer within two business days.

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Size Wise never asks for them.

Get Size Wise

Free · No sign-in · Read-only

Streamable HTTP, stateless, no authentication. Paste the endpoint into any MCP-capable agent.

https://sizewise.connectorbay.com/mcp
{
  "mcpServers": {
    "sizewise": {
      "type": "http",
      "url": "https://sizewise.connectorbay.com/mcp"
    }
  }
}