The right size, before they order three.
Fit Finder asks two numbers and a few taps, then sizes shoppers against your garment’s own measurements. No accounts. No crowd guesses. Fewer returns.
One snippet in. Instant sizes out.
No setup project, no shopper accounts, no guesswork.
Paste one snippet
One line of code. Live in minutes.
Two numbers, a few taps
Height, weight, done. No tape measure.
Instant size recommendation
Their exact size, right on the product page.
Start instantly, or add your Size Chart
Go live in minutes with universal sizing, then add a Size Chart when you want the top accuracy tier.
Start instantly
No setup and no chart upload. Works for every garment type and every shopper, sized from a body model built on hundreds of thousands of real body measurements.
Add your Size Chart
Create a Size Chart with us or connect the one you already have. Sizes are scored against your garment’s exact cut, and your chart’s look is applied automatically.
The Sizely Fit Engine
AI powered fit intelligence, trained on millions of real fit data points from real shoppers and tuned to the exact cut you sell. It reads the whole body, not just height and weight.
Where the numbers come from: the body model is built on ANSUR II, a public dataset of 6,068 adults measured about 93 ways each, and fit outcomes are validated against roughly 275,000 real orders from public fit research corpora.
Against the alternatives
Their published inputs and flows, our measured accuracy. Where we win, and where they still lead.
| True Fit | Fit Analytics | Kiwi Sizing | Sizely | |
|---|---|---|---|---|
| Works day one, no order history | ||||
| No shopper account | ||||
| Reads your garment's exact cut | ~ | ~ | ||
| Real body model behind the quiz | ~ | ~ | ||
| Published, measured accuracy | ||||
| Live answer as they refine | ||||
| Cross-store memory | ~ | |||
| Price to start | Enterprise | Enterprise | Per-plan app fee | $39/mo on Store, ships with your Size Chart |
The crowd vendors lean on history. The chart apps skip the body. We read both the body and your garment’s own measurements.
The full comparison, with sources and dates, is public: size recommendation apps compared.
The numbers we publish
Only what we can stand behind. Industry return figures ship with a visible citation or they don’t ship. One that does: size and fit drives 53% of apparel returns (Coresight Research, 2023), and the rest are in our return statistics.
Four ways to place it
Same engine, your choice of surface. The fourth is Apparel’s extra card, the tab inside your Size Chart.
Inline link
A quiet text link by the size selector.
Pop-up
A floating button that opens over the page.
Docked panel
A corner panel that browses with the shopper.
Inside your Size Chart
The Find my size tab, Apparel’s extra card.
Your store’s look, on the widget
One snippet, your whole catalog
Paste it once. It reads each product page, runs the right flow for that garment, and stays hidden on pages it does not fit.
Shopify
WooCommerce
BigCommerce
Squarespace
WixCustomCopy the snippet
One line from your Apparel configurator.
Paste it once
Before the closing body tag, or via your theme editor.
Go live
Shoppers get their size on every apparel product page.
Step-by-step guides for every platform are in the app.
Included with Store and Brand
Configure and preview the full widget on any plan. Going live is included with Store and Brand, on one shared Fit Finder views pool across Shoes and Apparel.
Fit Finder also does shoes
The Shoe Size Recommender turns a pair a shopper already owns into their size in your brand, verified against 370+ official size charts. Same install, same shared view pool.
Run a larger brand?
Custom rollouts, multiple storefronts, SDK and API integrations, and white glove setup. We build the plan around your catalog.
One short form. A real person reads every note and comes back with a plan, not a pitch.
Good to know
Does it need shopper accounts?
No. Shoppers answer two fields and a few taps, and get their size. Nothing to sign up for, ever.
Does it work without my Size Chart?
Yes. Universal garment sizing works from the garment type alone. Connect one of your Size Charts for exact-cut accuracy.
What stores does it run on?
Any store. It is one script tag that works on Shopify, WooCommerce, BigCommerce, Squarespace, Wix and any custom site.
What does it cost?
Going live is included with the Store plan at $39 a month, on a shared Fit Finder views pool across Shoes and Apparel. Brand at $149 a month raises the pool. Every price is public, no sales call.
How accurate is it?
96.1% exact and 96.9% within one size, measured not estimated. Accuracy climbs from a starting size to near certain as shoppers add a tap or a measurement.
Can I style it?
Yes. Four themes, your accent, corner and fonts. Inside your Size Chart, the tab inherits the chart's published look automatically.
Will it slow my page down?
No. The trigger is a tiny deferred script. The flow loads in an isolated frame only when a shopper opens it, and never touches your page's own code or styles.
Where does the answer come from?
From the garment's own measurements, matched to the shopper's body. Not a generic chart, and not other shoppers' returns.
The right size, before they order three.
Add Fit Finder to your store and let shoppers size against your real garments, in about five minutes.