See how big it actually is.
Paste a size from any product page and see it next to things you know: your hand, a bank card, a plastic chair, a doorway. On shoes and clothes, it says which size to buy.
Works offline No account needed Chrome, Edge and Firefox
Sell online? Put the size under your prices. ThisBig for shops
Every product photo is the same size.
A fridge and a lunchbox both fill your screen. Even the ruler above is only right on some phones.
40 × 30 × 25 cm
Numbers you can’t picture
Correct, and no help at all. Is that a handbag or a travel bag?
Size 32
A size that doesn’t say what it measures
Waist? Leg? Inches? The shop doesn’t say.
See it answeredA return costs a trip, a fee or the whole price. Check the size before you pay.
Bring the size however you found it.
Or share a product page straight into ThisBig from any app.
Screenshot
Screenshot a product page or a size chart. Uses no data.
Link
Paste a link from Jumia, Amazon, Instagram or any shop’s site.
Photograph a tag
Point the camera at a size tag, a spec label or a printed chart.
Type it in
Type the numbers in centimetres, inches, feet or millimetres.
On this page, type a size or paste a link. For screenshots and tag photos, use the app or the WhatsApp bot.
What happens next
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1
Reads it
Finds the size in whatever you gave it. Instantly, and offline.
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2
Checks it
A wristwatch 4 m long is a typo. ThisBig won’t draw a size that makes no sense.
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3
Draws it
It stands beside up to three things you know: one smaller, one about the same, one bigger.
Then it says it in words, smallest to biggest
- Fits in the palm of your hand.
- Easy to hold in one hand.
- Takes both hands to carry.
- Awkward for one person to carry.
- A two-person carry, tilted to get through a doorway.
- Won’t go through a doorway.
Shoes
Will they fit you?
Tell ThisBig the size you wear, or measure your foot on a sheet of A4 paper. Every shoe page then says which size to buy, and draws your foot inside the shoe.
If the shop says “Asian size, choose one size up”, it moves you up one. If your size is sold out, it says so.
Brands run big or small, so ThisBig says when it’s using a standard chart.
What size do you wear?
Men’s canvas sneakers · sizes EU 39 to 45
Tops and trousers
Size 32. Waist? Leg? Yours?
Measure a pair that fits, laid flat, or just say your waist size. ThisBig reads the shop’s size chart and says which size to buy.
A leg that’s a bit long is a tailor’s job. A tight waist isn’t, so the waist comes first. It allows for stretch, too.
What do you know about your trousers?
Slim fit jeans · waists 30 to 36, L32
Skirts and dresses
62 cm long. Where does that fall on you?
Give your height and ThisBig shows where it lands on you: above the knee, just below it, mid-calf or at the ankle.
From your height alone it’s an estimate. Measure from waist to knee once and it’s exact. A bare “12” can be UK or US, four sizes apart, so it says which it read.
How tall are you?
Pleated midi skirt · UK 10 to 16
Browser extension · Chrome, Edge and Firefox
The size, before the price.
Open a product page and the answer is already under the title. On shoes and clothes, it says which size to buy. Click it to see the drawing beside the page.
Bags › Backpacks
School Backpack, 3 Compartments, Water-Resistant
$24.90
Specifications
Size (H x W x D cm): 42 x 30 x 13
Weight (kg): 0.6
Colour: Black
On shop pages
Yellow: the size came from the page. White with Estimate: the page didn’t say, so ThisBig guessed.
On any other page
Highlight a size, right-click and choose See how big this is. Works on social posts and WhatsApp Web catalogues too.
Beside the page
The drawing opens in a side panel, next to the product page. Copy it into WhatsApp Web for whoever you’re buying with.
It reads only the shops it knows. Everywhere else, it waits for your right-click.
ThisBig for shops
Every shopper sees it. Nothing to install.
Selling sofas, suitcases, cots or fridges? Add one line to your product pages, between the price and the buy button. Everyone who visits sees how big it is, beside things they know, without leaving your page.
Free to 1,000 sized views a month Shopify, WordPress or any site
The size, in one line
Under the price: how big it is, beside something they know. No size on the page, no line.
The drawing, on tap
To scale, with every size written on it, beside things people know in your shop’s country.
Whether it fits them
Shoppers with ThisBig see it against their own alcove or car boot. On every plan.
Add the Shopify app, the WordPress plugin, or two lines on any other site. How to add it
When it’s guessing, it says so.
Every answer shows how sure it is. Anything assumed is one tap to fix.
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Verified
Made to a standard size. A bank card is 85.60 × 53.98 mm everywhere, and a sheet of A4 paper is 210 × 297 mm.
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Typical
A common size, not a fixed one, like a plastic chair.
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Estimate
The page left something out, like the unit, so ThisBig assumed it. One tap fixes it.
Electric Kettle 1.8L, Stainless. 12 x 8 x 4
Next to things you already know.
A bank card for earbuds, a chair for a fridge, a doorway for a wardrobe. And local ones: a danfo bus in Lagos, a pillar box in London, a tuk-tuk in Cairo.
Or use your own hand.
Lay your hand flat on a sheet of A4 paper and take one photo. ThisBig measures it to within about 5 mm. Add your height, and the person in every drawing is you.
And whether it fits where it’s going.
Measure your car boot, a shelf or your front door once. Every product page after that says whether it fits, and by how much. Save your laptop, and bags say whether it goes in.
Measure before you pay.
On Android, iPhone and in your browser. Works offline.
Run a shop? Add ThisBig to your product pages