Recommend the perfect size in seconds
A “Find My Size” button on every product page opens an AI-powered size quiz that gives each shopper a single answer — “Your size is M” — and remembers their measurements across visits. Available on Pro plans of SmartSize.
Built for Shopify — find SmartSize on the Shopify App Store
SmartSize earned Shopify's Built for Shopify badge — the top-tier quality recognition for apps that meet the highest bar on storefront and admin performance, integration, and merchant experience. The “Find My Size” quiz is fast on mobile, light on your theme, and installs straight from the Shopify App Store.
Fast and simple size quiz for Shopify Stores
Upload your size chart. We will do the rest
Tailored to Every Product Type
Whether you're selling hoodies, dresses, jeans, or leggings—for men, women, or unisex styles—SmartSize adapts seamlessly to your catalog.
- Works with men's/ women's/ kids' and unisex apparel
- Lingerie quizzes with bra-and-underwear-specific UX
- Pet quizzes for collars/ harnesses and apparel
- Multi-language quiz flows out of the box
Seamless Style
Keep your size quiz perfectly on brand with your store’s look and feel.
- Customize your quiz with your brand’s accent color
- Choose the position of the size chart button
- Personalize the button’s icon/ color and label.
AI and rule-based recommendations
Three quiz types so every store finds the right fit for its catalog. Optional measurement review so shoppers can sanity-check before committing. And recommendation memory that remaps a returning shopper's measurements against any product's chart — so they never have to retake the quiz.
- Prediction quiz — quick lifestyle questions/ AI predicts measurements
- Precision quiz — shopper enters their actual measurements
- Lingerie quiz — bra-and-underwear-specific imagery and prompts
- Optional measurement review step before the result
- Recommendation memory across visits and across products
Fast performance
SmartSize is optimized for speed—ensuring a smooth, seamless experience for both merchants and shoppers.
- No impact on your store's loading times
- Quick and hassle-free install and uninstall
- Fully responsive across all devices
- Ultra-fast interface for effortless quiz setup
The quiz rides on top of beautiful size charts.
Every plan starts with SmartSize's size charts — modern, mobile-friendly, multi-language, and built into the same app. The quiz extends them with a single, personal answer.
Explore size charts