Step 1
They enter their details.
Gender, height, weight and age: information they already know, sent over an encrypted connection.
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One size. The right one.
Ordering two sizes “to try” is a natural reflex when you are unsure. WeeFizz recommends the right size on your product pages, calculated in your own size chart.
Recommended sizecalculated in your size chart
14-day trialon every plan
In context
Her size in a few seconds.
Your customer is torn between two sizes. She opens “Find my size” on the product page, answers a few questions and sees her recommended size before adding to basket.
Real widget on mobile, demo storeIntegration
One solution, whatever your platform.
The same widget and the same WeeFizz workspace, from the back office you already use. On Shopify, installation takes a few clicks.
ShopifyOfficial app on the Shopify App Store
PrestaShopModule from PrestaShop 1.7
WooCommerceWordPress extension
Detailed guides: Shopify size recommendation PrestaShop module WooCommerce extension Size recommendation in e-commerce (French)
Who it's for
Any store that sells clothing.
Independent brands, multi-brand e-shops, retail chains: the widget works from your own size chart, whatever your market.
Ready-to-wearSportswearStreetwearOutdoorDenimWorkwear
The widget, for real
One button on the page. A size in seconds.
This is the real journey, recorded on mobile: the customer opens “Find my size”, answers, and adds to basket in the recommended size.
- Your size chart. The size is calculated from your brand's own size chart, never a generic one.
- Size remembered. It follows the customer throughout their visit.
- Your look. Button colours, corner radius and label are set from your workspace.
The customer journey
A few answers. The right size.
“M or L?” Your size chart is precise, but your customers don't know their measurements. They want an answer, not a table of centimetres.
Step 2
They pick their body shape from images.
Upper body, stomach, hips: they choose the image that looks most like them, from three icons.
Step 3
The right size, ready to add to basket.
Calculated against your size chart and remembered for the rest of the visit.
Your customers' answers travel over a 100% encrypted (SSL) connection and are hosted in Europe.
Every cut
The right fit, first time.
Denim jacket, running trousers or dress: when the size is right at the point of order, the parcel stays with your customer.
Screenshot of the WeeFizz workspace, Analytics section (demo store).
Your WeeFizz workspace
Data that helps you sell more.
- Conversion. The share of customers who add to basket after their recommendation.
- Widget usage. How many visitors open it on each product page.
- Sizes by product. Recommended and chosen sizes, to fine-tune your stock.
- Products that cause hesitation. When the chosen size differs from the recommendation, you know which product page to review.
- Your customers. Buyer profiles and e-mail addresses captured with their consent.
Brands that dress their customers and their teams.
Getting started
Installed in 3 steps, no developer.
You create your account, paste your keys into your back office, and the button appears on your product pages. Import your size charts or pick from 8 ready-made templates.
- 1
Choose your platform
Shopify, PrestaShop, WooCommerce or JavaScript SDK. Your account is created in three minutes, no credit card needed.
- 2
Paste your keys
Your WeeFizz credentials arrive by e-mail. On Shopify, the app sets them up by itself.
- 3
Switch it on
The “Find my size” button appears on your product pages. You track real usage from your workspace from the very first visit.
Data
Precise for your customers. Scrupulous with your data.
No photo needed
No images, no camera, no biometric data. Self-reported answers only.
GDPR compliant
Minimal collection, clear purpose, individuals' rights guaranteed.
Hosted in the European Union
Data stored and processed on servers located in the EU.
Your data stays yours
Size charts, history, analytics: everything belongs to your store.
Simulator · Estimate
What do size-related returns cost you?
Your traffic and your orders are all it takes. The simulator picks the right plan and estimates your savings, based on your own assumptions.
Estimated net result per month
€0ROI ×0
Adjust your assumptions or choose the Solo plan.
Returns avoided0per month
Logistics savings€0per month
Revenue retained€0per month
Recommended plan for your traffic
Solo €59500 recs/month
Studio €1392,000 recs/month
Agency €29910,000 recs/month
per month, billed monthly
Assumed drop in size-related returns
14-day trial, no credit card. An estimate based on your own assumptions, which you can change above: not a guaranteed result.
See how it is calculated
- Estimated recommendations = visits × share of visitors who use the widget (600 per month)
- Recommended plan = the smallest plan whose quota covers that volume: Solo 500, Studio 2,000, Agency 10,000 recommendations per month
- Returns avoided = orders × return rate × size share × estimated drop (assumption used: 30%)
- Logistics savings = returns avoided × cost of handling one return
- Revenue retained = returns avoided × average basket
- Net result = logistics savings + revenue retained − plan cost
- ROI = (logistics savings + revenue retained) ÷ plan cost
Pricing
Simple pricing. A free trial to help you decide.
14-day free trial on every plan. No credit card required, no commitment.
2 months free
Solo
For a store that wants to stop guessing.
€59excl. VAT/ month
Excl. VAT · 14-day trial, no card
- 500 recommendations per month
- “Find my size” widget on every product page
- Size charts: chart import + 8 ready-made templates
- Essential statistics: visits, opens, usage rate, recommendations, add-to-baskets
- Recommendation history and CSV export
- Monthly usage report by e-mail
Studio
For a brand that manages its sizing with data.
€139excl. VAT/ month
Excl. VAT · 14-day trial, no card
- Everything in Solo
- 2,000 recommendations per month
- Advanced analytics: recommended vs chosen sizes, gaps, trends by product
- Views by product and by period, PDF export of the performance report
- Customer e-mails captured with consent
- Detailed monthly report and priority support
Agency
For high-traffic stores and demanding teams.
€299excl. VAT/ month
Excl. VAT · 14-day trial, no card
- Everything in Studio
- 10,000 recommendations per month
- Customer analysis: breakdown by gender, size and body shape
- Weekly report and performance review with a WeeFizz expert
Prices excl. VAT. 14-day free trial. No commitment, cancel at any time. Switch plans in one click.
Each subscription covers one store. More than 10,000 recommendations per month? contact@weefizz.com
On Shopify, install the app from the Shopify App Store: the subscription is billed by Shopify.
Not sure?
Book my 30-minute call
Let's talk for 30 minutes.
A 30-minute call to see the widget on your products, check your size charts and answer all your questions. Selling clothing on Shopify, PrestaShop or WooCommerce? We look at the widget on your own products.
FAQ
Frequently asked questions.
Do my customers need to send a photo or measure themselves?
No. Three questions: gender, height/weight/age, body shape from icons. The measurement engine calculates the rest.
Is the recommendation based on my size charts?
Yes, exclusively. Import your charts or start from one of 8 ready-made templates, then adjust. Never a generic chart.
How long does installation take?
A few minutes, with no developer: you install, paste your keys, and the button appears. For a custom-built site, the SDK integrates with a simple script.
Is the widget GDPR compliant?
Yes. Self-reported, minimal data, hosted in the European Union. E-mails captured only with explicit consent.
What happens at the end of the 14-day trial?
You carry on with the plan that suits you, or you stop. No commitment, cancel at any time.
Can I change plans or cancel?
At any time, in one click from your WeeFizz workspace. Paying annually gives you 2 months free.
Does the widget slow down my store?
No. The script is lightweight and loads after your page.
How size recommendation works and which tools to compare: the complete guide (in French). Step-by-step installation: Shopify, PrestaShop, WooCommerce.
WeeFizz Fashion
Your customers know their size, starting today.
Create your account in three minutes, add your keys, and the button appears on your product pages.
