PrestaShop Artificial Intelligence

AI Size & Fit Advisor

The right size advice, based on measurements and morphology.

Recommend the right size to every shopper, where the static size guide stops.

PrestaShop 8 & 9 Optional AI layer Multistore & multilingual Zero dependency
  • 30-day refund
  • 12 months updates
  • 24h support
www.datafirefly.com/en/
AI Size & Fit Advisor
v1.0.0 · updated 2026-06-17
What it does

The short version.

01

Measurement-based recommendation

Shoppers enter chest, waist, hips… and get the best-fitting size, not just a frozen lookup table.

02

Optional AI layer

Enable Mistral, OpenAI or Anthropic to refine by morphology and generate an explanation in the shopper's language.

03

Size-chart editor

Build your min/max grids per measurement at global, category or product level, right from the back office.

04

Fewer returns, more sales

A well-chosen size cuts returns and removes the purchase barrier on fashion and footwear pages.

The long version

Everything you'd want to know before you install.

A detailed look at how AI Size & Fit Advisor works, why we built it the way we did, and the thinking behind the features above.

§ 01

The problem with static size guides

A conversion table never tells a shopper which size actually fits them. They are left interpreting numbers, hesitate, and often order two sizes "just in case" — which inflates returns. AI Size & Fit Advisor replaces that frozen table with a personalized recommendation.

§ 02

A recommendation in seconds

On the product page, a "Find my size" button opens a modal. The shopper enters their measurements, optionally height, weight and fit preference, then receives the recommended size, a confidence score, an alternative and a measurement-by-measurement breakdown.

§ 03

Deterministic engine, boosted by AI

The core of the module is a deterministic engine that scores every size against your grid ranges and applies a bias based on the fit preference. If you enable the AI layer, the module refines the decision accounting for morphology and writes a short explanation in the shopper's language. If the API is unavailable, the module automatically falls back to the deterministic engine — so it works even without an AI key.

§ 04

You stay in control of your charts

A visual editor lets you define your size charts: one row per size, one column per measurement with a minimum / maximum range. Charts apply globally, by category or by product, with a cascading resolution of product then category then global.

§ 05

Learn from your sales

With fit-learning enabled, the module anonymously logs profiles and recommendations to refine relevance over time and flag the references that run small or large.