Sizebay Review (2026): Pricing, Features & Honest Verdict

TLDR

Sizebay is an AI virtual try-on and size recommendation tool for fashion ecommerce that helps shoppers pick the right size before buying, cutting returns and exchanges. It is focused and proven, with real brand customers. Best for: apparel stores fighting returns. Price: custom quote, no free plan. Rating: 7.4/10.

What is Sizebay?

Sizebay is a fashion technology tool that drops a virtual fitting room and size recommendation widget into an online store. A shopper enters a few details, height, weight, age, and for shoes a foot-shape analysis, and Sizebay suggests the size most likely to fit. The goal is simple: stop people from ordering two sizes and sending one back, which is the single biggest cost in apparel ecommerce. Returns eat margin, clog logistics, and frustrate customers, so even a small reduction flows straight to the bottom line.

The company has roots in Brazil and now operates with European backing, with offices spanning North America, Europe and Latin America. We dug into its customer list and it is not vapourware: luxury and mainstream brands including Intimissimi, Roberto Cavalli, Pucci and Miik appear as customers. Those are not logos a tiny startup wins easily, which tells you the product holds up in production. Beyond core sizing, Sizebay has expanded into a Fashion Hub with AI recommendations, visual search and outfit visualisation, pushing it from a pure fit tool toward a discovery layer. That expansion is sensible, since the same shopper data that powers sizing can power recommendations, but the sizing engine remains the heart of the product and the reason most stores sign up.

What Are Sizebay’s Key Features?

Virtual try-on and size recommendation

The core feature is the fitting room. Shoppers answer a short set of questions and Sizebay returns a recommended size for that specific product, not a generic guess. For footwear it analyses foot shape rather than just length, which matters because two shoes in the same nominal size can fit very differently. This is the part of the product that directly attacks returns, and it is what most customers buy Sizebay for. The experience is quick enough that it does not scare shoppers off mid-purchase, which is the balance any fit tool has to strike: gather enough input to be accurate without adding friction that costs you the sale.

Automated size charts

Sizebay also manages product-specific size charts automatically, so each item shows accurate measurements instead of a single store-wide table. For brands that carry many fits and suppliers, keeping size charts correct by hand is a real chore, and automating it removes a common source of wrong-size orders. A mislabelled chart on a single popular product can generate a wave of returns, so this quiet feature does more work than it gets credit for. It also keeps the storefront consistent, so a customer comparing two items sees sizing presented the same way rather than two clashing tables.

Fashion Hub discovery tools

The Fashion Hub bundles three extras: Fashion Hint for AI product recommendations, Fashion Image Search for visual search, and Fashion Looks for outfit visualisation. These aim at conversion and average order value rather than returns, and they are why one customer cited a 20% lift in AOV. They are useful, but they are add-ons to the sizing core, not the reason to buy. If your main pain is returns, treat them as upside; if your main pain is discovery and merchandising, weigh Sizebay against dedicated recommendation engines that do only that and may go deeper.

Platform integrations

Sizebay integrates with the major ecommerce platforms, including Shopify, Magento and WooCommerce. That matters because a fit tool only earns its keep if it installs cleanly on the storefront you already run, without a custom engineering project. The integration breadth makes Sizebay realistic for most mid-market apparel stores rather than only large custom builds. For a Shopify or WooCommerce merchant, that lowers the barrier to trying it, since adding the widget does not mean rebuilding the product page from scratch.

How Much Does Sizebay Cost?

Sizebay does not publish standard plans, so the practical answer is custom pricing after a demo. One software directory lists a starting figure of R$70 per user per year, but that is a thin data point; most retailers will be quoted based on catalogue size, traffic and which modules they enable. There is no public free trial, so you cannot self-serve your way to a test the way you can with a Shopify app.

For context against the category, True Fit and Virtusize are also enterprise, quote-based tools, while newer entrants like Sizekick target mid-market budgets. The honest framing is that sizing tools are priced on the value they recover, not a flat list price. If a tool trims even a couple of percentage points off your return rate, it usually pays for itself quickly on a clothing catalogue, because returns are expensive in shipping, restocking and lost margin. The catch is that the payoff scales with volume, so the same tool that is obviously worth it for a high-traffic apparel store is harder to justify for a small one.

Our read: treat Sizebay as a mid-tier investment and insist on a trial period or pilot so you can measure the actual return reduction on your own products before signing an annual deal. Ask the team to model the expected return reduction against your current rate, and hold them to measuring it once live. A vendor confident in its product should welcome that, and the case studies suggest Sizebay can back the claims up.

Who is Sizebay Best For?

Use Sizebay if you run a fashion or footwear store with a real returns problem and a catalogue varied enough that shoppers genuinely struggle to pick a size. It fits growing labels through to luxury brands, works on the common ecommerce platforms, and adds discovery tools on top if you want them. The more sizing inconsistency across your catalogue, the more a tool like this earns its place.

Skip Sizebay if your catalogue is tiny, your return rate is already low, or you sell categories where sizing is not the friction. In those cases the quote-based cost is hard to justify, and a simple, free size chart app may do the job. The same goes if you are not ready to commit to an annual deal, since the lack of a public free trial makes a quick, low-stakes test harder than with an app-store competitor.

Best Sizebay Alternatives

True Fit

True Fit is the heavyweight, with a fit database covering tens of millions of shoppers and thousands of brands. It offers the deepest cross-brand size intelligence, which is its edge over Sizebay, because it can draw on a shopper’s history across many retailers rather than just your store. It is firmly enterprise and quote-based, so it is overkill for smaller stores. Pick it if you are a large retailer that wants the most data behind every recommendation and can absorb the enterprise cost.

Virtusize

Virtusize takes a different angle: it lets shoppers compare an item to something they already own to judge fit, alongside an avatar try-on. It is strong with global and Japanese brands and is a good fit if your customers respond better to compare-to-my-clothes than to a measurement form. Pricing is also quote-based. Choose it when your audience trusts comparison to a known garment more than a sizing questionnaire.

Sizekick

Sizekick uses AI and body measurements to size shoppers and is aimed squarely at mid-market fashion ecommerce. It is the most natural like-for-like alternative to Sizebay for a growing brand, often with simpler onboarding. Evaluate it head-to-head with Sizebay if you want a modern, conversion-focused sizing tool without enterprise weight, and let the pilot numbers on your own catalogue decide between them.

Final Verdict: Is Sizebay Worth It?

Sizebay earns its 7.4. It does one valuable thing well, helps fashion shoppers buy the right size, and it backs that up with recognisable brand customers and concrete return-reduction claims. The expansion into discovery tools is a sensible bonus rather than a distraction from the core, and the platform integrations make it practical to deploy on the store you already run.

The reservations are pricing and proof. Quote-based pricing with no public trial makes it harder to commit, and the thin independent review base means you are leaning on the vendor’s own case studies rather than a wall of third-party reviews. Our recommendation: if you sell apparel or footwear and returns hurt, request a demo and push for a measured pilot with clear before-and-after numbers. If the metrics move on your catalogue, Sizebay is an easy yes. If they do not, you will know quickly and can walk. The brand customers and return claims tell us the product works; the only real question left is whether it works hard enough on your specific catalogue to clear the quote-based cost, and a short pilot answers that better than any review can.