A tailor's precision, at global scale. Free size calculators for t-shirts, bras, shoes and more — every country, every body, no sign-up.
Clothing, undergarments, footwear and more — for men, women and kids, mapped across US, UK, EU and India.
Chest & shoulder based, unisex chart
Band + cup, from two measurements
Foot length → US / UK / EU / India
Waist based, unisex chart
By age or height, boys & girls
From finger diameter
From head circumference
From your pant waist size
From hand circumference
Chest based, roomier fit
From wrist circumference
Not sure of your measurement, or already know a size in one country? These are built for that.
Reference tables for men, women, kids and shoes — no typing needed
🌐Already know your size? Convert it straight across US / UK / EU / India
📖How to measure yourself, and why sizes vary so much
🧵Fabric calculator and cutting tools, for tailors and custom stitching
US, UK, EU, India & more, cross-converted instantly
No sign-up. No paywall. Just your size.
Easy on the eyes, day or night
Add to your home screen, use it like an app
Yes. Every calculator here is completely free, with no sign-up and no usage limits.
No. Every calculation runs locally in your browser. Your measurements are never sent to or stored on our servers.
Each brand uses its own block pattern and fit philosophy, so a Medium in one brand can fit differently from a Medium in another, even at the exact same chest measurement. Always check a specific brand's chart when it's available.
It uses a standard band-and-cup measurement method — a reliable starting point, but fit still varies by brand and style, so trying before buying is always recommended.
Yes — every calculator has its own shareable link, for example 7tshirts.com/#bra opens straight to the Bra Size Calculator.
Yes — the site is fully responsive, and most browsers (like Chrome) will offer their own "Install" or "Add to Home Screen" option — usually as an icon in the address bar or your browser menu.
It's based on standard foot-length-to-shoe-size charts used across US, UK, EU and India. Brands like Nike or Adidas can run half a size differently, so treat it as a strong starting point.
A Calculator takes your own body measurement and gives you a size. A Size Chart is a static reference table you read directly. The Converter is for when you already know your size in one country and want it in another — no measuring needed.
No. Every tool on 7TShirts works immediately, with no account, login, or email required.
Yes — every calculator result has Copy, Print, and Share buttons, so you can save your size, print a clean copy, or send it to a friend instantly.
Yes — use the circular toggle in the top-right corner of the header. Your choice is remembered on your next visit, on this device.
Once you've visited the site, core pages are cached for faster loading and basic offline access, thanks to a built-in service worker.
They give a solid planning estimate — fabric needed, pieces cuttable, thread required — but always leave a margin and confirm with your tailor before making final fabric or thread purchases.
Roughly 2 to 12 years, using both height and age as inputs. Height is generally more reliable, since children of the same age can vary a lot in size.
Diameter is easier to measure accurately from an existing ring, and it's the number most international ring size charts are built around. We explain how to measure it either from your finger or an existing ring right on the calculator.
Please contact us with the calculator name and the inputs you used, and we'll look into it as quickly as possible.
Measure around the fullest part of your chest, keeping the tape flat and level.
Measure straight across your back, shoulder point to shoulder point.
| Size | US/UK | India | EU | Chest (in) |
|---|
Measure directly under your bust, tape snug and level.
Measure around the fullest part of your bust, tape level, wearing a non-padded bra.
Stand on paper, mark heel to longest toe, measure the line in cm.
| US | UK | EU | India | CM |
|---|
Measure around your natural waistline, where you'd normally wear the waistband.
Measure from the crotch seam to the bottom of the ankle.
| Waist (in) | Letter | India | EU |
|---|
Most accurate — measure standing height without shoes.
Wrap a strip of paper snugly around your finger, mark where it overlaps, then measure the length and divide by 3.14 (π) to get diameter — or measure a ring you already own that fits well.
Wrap tape around your head about 1cm above your eyebrows, over the widest part.
Use the waist size on your pants' label, or measure where you'd wear the belt.
| Pant Waist | Belt Size |
|---|
Wrap tape around your palm at its widest point, not including the thumb.
| Letter | Continental | Hand (in) |
|---|
Measure around the fullest part of your chest, tape flat and level.
| Size | US/UK | India | EU | Chest (in) |
|---|
Wrap tape around your wrist, just below the wrist bone, where you'd wear a watch.