The right size, 98.1% of the time with your Size Chart connected.
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.
Free to start. No credit card.
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 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
Fit intelligence trained on thousands of real body measurements 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 | ||||
| Lives inside your Size Chart | ||||
| Live in minutes, one snippet | ||||
| Shoe recommender from a pair they own | ~ | |||
| Self-serve pricing public, no sales call | ||||
| Works beyond Shopify | ~ | ~ | ||
| Billed on shoppers who use it, not your orders | ||||
| Cross-store memory | ~ | Custom | ||
| Price to start | Enterprise | Enterprise | Per-plan app fee | $39/mo on Store, ships with your Size Chart |
Assuming a healthy 3% conversion rate and 6% of shoppers opening a size tool. Prices on both sides are the annual plan (Store $39 is $47 billed monthly, Brand $149 is $179). The estimator on this page defaults to a more conservative 2% conversion rate, and you can change either number.
Store plan, about 2,000 opens. Kiwi Plus is cheaper on sticker: their $11.99 tier includes up to 10 published recommenders and 20 charts, Shopify only, no shoes. The $39 buys both Fit Finders, shoes included, and 50 Size Charts on any platform.
Brand plus one Booster pack, with room to stack up to 5. Kiwi bills on your orders, so their price climbs as you grow. Ours moves only when more shoppers open Fit Finder.
Past the self-serve ladder, we price your scenario together with real open-rate data. The SMB tools stop here. The enterprise vendors start at the same money without showing you the math.
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.
Which store is yours?
Pick the closest profile. The answer is what better sizing is worth to that store every year. The bill sits at the bottom, where it belongs.
The bill for all of that: Brand plan, $149 a month on the annual plan ($179 billed monthly), 8,000 opens included, covered by the first 3 avoided returns. The widget never shuts off at the cap.
Play with the numbers (prefilled from the selected profile)
Assumptions for this estimate: 6% of sessions open Fit Finder, 2% conversion rate, $65 AOV, 25% return rate, a 20% cut in size-driven returns and a 2% conversion-rate lift. Every one of them is editable in the panel above. Sources: 53% of apparel returns are size or fit related (Coresight Research, 2023). 19.3% average online return rate (NRF, 2025).
Our defaults sit well below published vendor case-study claims (True Fit case studies cite 2 to 4x conversion for tool users and up to 24 to 50% cuts in fit-related returns). We model a 2% sitewide lift and a 20% cut, and you can set both yourself.
Fit Finder also does shoes
The Shoe Size Recommender turns a pair a shopper already owns into their size in your brand. Fit mapped per brand, with 370+ brands verified against the sizing the brand uses itself. Same install, same shared opens pool.
Run a larger brand?
Custom rollouts, multiple storefronts, 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
What is an apparel size recommender?
An apparel size recommender is an on-site tool that tells a shopper which size to order before they buy, instead of leaving them to read a size chart and guess. Fit Finder asks for two numbers and a few taps, then scores the shopper against your garment’s own measurements rather than crowd data or a generic chart. Size and fit drives 53% of apparel returns (Coresight Research, 2023), so answering it on the product page is where the return rate moves.
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 if I sell my own label?
That is the normal case here. Apparel sizes shoppers against your garment's own measurements, so there is no brand catalog to be in: connect a Size Chart you built with us and every answer is scored against the exact cut you publish. On the Shoes side you hand us your own size ladder as foot length in millimetres, we verify it against the sizing you sell, and then your label answers in the widget like any other brand.
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 the annual plan ($47 billed monthly), on a shared pool of Fit Finder opens across Shoes and Apparel. Store includes 2,000 opens a month, and Brand at $149 a month ($179 billed monthly) includes 8,000. Need more? Booster packs add 5,000 opens each for $99 a month, stackable up to 5. Every self-serve price is public, no sales call, and above 33,000 opens a month we price your scenario with you.
How accurate is it?
With your Size Chart connected, 98.1% exact and 99.8% within one size, measured not estimated. Without a chart it works from standard sizing, and accuracy climbs 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.
Does it speak my shoppers' language?
Yes. Fit Finder runs in English plus 12 more languages: German, Spanish, French, Italian, Dutch, Polish, Portuguese (Brazil), Swedish, Turkish, Japanese, Korean and Simplified Chinese. Every line a shopper reads is translated, and the shoe flow also opens on the size system that shopper expects.
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.