Pro feature · Prediction + Precision · remembered across products
A Find My Size button opens a short quiz and returns one answer — “Your size is M” — with the fit breakdown behind it.
Linen Safari Dress
Recommendation
Remembered and remapped across products.
Prediction keeps the quiz fast. Precision gives shoppers maximum accuracy. Both end with one recommended size.
Shoppers answer a few simple questions — height, weight, age, and body-shape cues — and SmartSize estimates their measurements in seconds.
Shoppers enter real measurements with step-by-step guidance. No estimation — just the most accurate path for fitted, tailored, technical, or high-consideration products.
The button sits next to the size selector on the product page.
Prediction estimates measurements; Precision uses exact numbers.
The result is remembered and remapped across products.
SmartSize scores every size against the chart, rates each measurement, and explains why one size wins. It is intentionally more forgiving of looseness than tightness.
Fit Lab lets you simulate a shopper, inspect why each size wins, and tune the recommendation before it reaches your storefront.
Category-specific prompts keep the quiz clear for shoppers and useful for merchants.
Men’s, women’s, kids’ and unisex flows with prompts shoppers can answer quickly.
Bra-and-underwear-specific prompts for bust, underbust, waist and hip.
Collar, harness, and apparel flows with neck, chest, and back measurements.
Quiz flows are built to appear in every supported storefront language.
One app, one install
Every plan starts with modern size charts. Pro adds the AI Fit Quiz, using the same chart data to give every shopper one personal answer.
Explore size chartsA fit quiz adds a Find My Size button to your product pages. The shopper answers a few short questions or enters their measurements, and SmartSize recommends one specific size — for example 'Your size is M' — instead of leaving them to read a chart and guess.
SmartSize estimates or takes the shopper's measurements, then scores every size in your chart for how well it fits — rating each measurement from perfect to too tight or too loose. It is intentionally more forgiving of looseness than tightness and ranks the best overall match. Shoppers see exactly how each size fits, so it is transparent rather than a black box.
Not for the Prediction quiz. Shoppers answer a few simple questions — height, weight, age and a couple of body-shape questions — and the model estimates their measurements in seconds. If they prefer maximum accuracy, the Precision quiz lets them enter exact measurements instead.
Yes. SmartSize stores each shopper's measurements and recommendation. On the same product they see their size instantly, and on a different product their stored measurements are remapped against that product's chart — so they never have to retake the quiz.
Men's, women's, kids' and unisex apparel, lingerie with bra-and-underwear-specific prompts, and pet products such as collars and harnesses. Each category gets a tailored quiz flow with the right measurements.
The AI size quiz is part of SmartSize's Pro plans, which also include unlimited size charts and the Fit Lab simulator for testing recommendations before publishing. Beautiful size charts are available on every plan, including the free one.
Beautiful size charts are available on every plan. Add the AI Fit Quiz on Pro when you are ready to recommend a size for every shopper.
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