Free
$0
Start with the Smart Selector and Radiant's default storefront design.
- 2 active size charts
- 1 Smart Selector chart
- 50 Smart Selector sessions per month
- Radiant default sidebar design
Give shoppers clear, product-specific size guidance.
Build reusable size charts, assign them to the right products, and offer an optional guided recommendation based on the chart you configure.
Shopify confirms pricing, billing terms, and any trial eligibility before approval.Give shoppers an answer before doubt becomes a return.
Radiant turns a few familiar details into clear, product-specific size guidance—so shoppers spend less time comparing charts and more time feeling ready to buy.
Less hesitationFewer repeated questionsA clearer path to purchase
Find your recommended sizeStep 2 of 3
Height170 cm
Weight68 kg
Recommended size
MWhy this size?Calculated in this browser · Used for sizing only
A sizing question can cost more than a support ticket.
When the answer is hard to find, shoppers delay the purchase, abandon the page, or choose a size they may later return. Radiant puts guidance on the product page while buying intent is still there.
See the decision from the shopper's side.
Walk through a sample sizing journey and see how Radiant turns simple inputs into a recommendation a shopper can understand.
Try the demoShopper previewSample product
Calculated in this browser- 1Details
- 2Height & weight
- 3Body shape
- 4Result
A few easy questions. One clear recommendation.
No measuring tape. No spreadsheet. No leaving the product page.
- 01Basic details
Start with familiar information that helps frame the sizing journey.
- 02Height and weight
Add useful context without reaching for a tape measure.
- 03Relevant body shape
Only product-specific shape questions enter the journey.
- 04Clear result
See the best available size match with understandable fit context.
79%
Nearly 4 in 5 holiday shopping visits happen on mobile.
Mobile accounted for 79% of global ecommerce traffic during the 2024 holiday season. Radiant keeps the recommendation flow responsive and touch-friendly on the same screen where the buying decision happens.
Salesforce · 2024 Holiday Shopping Data12
Your first size chart should take minutes, not an afternoon.
Start from one of 12 templates or build your own guide with the measurements, labels, units, and fit information your products already use.
StandardSize Chest WaistS 36–38 28–30M 38–40 30–32L 40–42 32–34
Women's topsSize Chest WaistS 36–38 28–30M 38–40 30–32L 40–42 32–34
Men's bottomsSize Chest WaistS 36–38 28–30M 38–40 30–32L 40–42 32–34
Set the rule once. Let the right chart follow the right product.
Assign by product, collection, product type, vendor, tag, or across the entire store. Specific rules take priority, so a growing catalog stays organized without duplicating the same setup.
Size chartStandard
ProductExact match
CollectionSecond priority
Vendor or tagCatalog rule
Make sizing feel like part of your store—not another app.
Match the launcher, colors, typography, presentation, logo, and fit-result treatment to your storefront. Paid plans can remove Radiant branding, while higher plans add custom visual assets.
Colors
TypographySoraLauncherButton
$89.00Find your size
See where sizing creates confidence—and where it still creates friction.
Follow consultations, recommendations, table opens, active sizing time, and add-to-cart behavior after a sizing interaction. Higher plans add size mix and product-level insight, with attributed returns when Shopify data access allows it.
OverviewBy productBy collection
Consultations
Recommendations
Add to cart
The safest body data is the data your brand never stores.
Radiant calculates sizing guidance in the shopper's browser. Height, weight, birth year, relevant body-shape answers, and estimated measurements are not sent to or stored on Radiant or Shopify servers—and they never become a stored body profile.
Less personal data to collect. Less sensitive information to secure. Less privacy risk for your brand.Local calculation
You provide—in the browser
Height170 cm
Weight65 kg
Body shapeRelevant answer
Your sizeM
- Body details stay in the shopper's browser.
- Radiant does not create a stored body profile.
- Shopify privacy requests cover applicable order-linked records.
Designed around GDPR data-minimization and privacy-by-design principles.
Merchants remain responsible for their notices, consent configuration, legal basis, customer-rights process, and jurisdiction-specific obligations.
The EU emblem identifies the referenced EU privacy principles only. Its use does not imply any connection with, support, sponsorship, approval, certification, consent, or endorsement by the European Union or any EU institution.Server-side body-data processing is not automatically unlawful, but it creates a heavier compliance burden for the merchant. If required controls fail, brands can face complaints, deletion orders, processing restrictions, reputational damage, and fines. Radiant avoids storing those body inputs by design.
Start at $0. Upgrade when sizing becomes a bigger part of your business.
Begin with the essentials, then add more charts, shopper sessions, visual control, and deeper analytics as your catalog grows. Limits stay clear, with no automatic overage charges.
Save 20% annually
Starter
$3.99/month
Remove branding and customize the storefront experience for a growing catalog.
- 10 active size charts
- 5 Smart Selector charts
- 500 Smart Selector sessions per month
- Full widget customization
Growth
$6.99/month
Scale recommendations with advanced analytics and custom visual assets.
- 30 active size charts
- 20 Smart Selector charts
- 5,000 Smart Selector sessions per month
- Custom ranges and size insights
Scale
$10.99/month
Unlimited charts and Smart Selector sessions for high-volume stores.
- Unlimited active size charts
- Unlimited Smart Selector charts
- Unlimited Smart Selector sessions
- Product-level complete analytics
All prices are in USD. Shopify confirms trial eligibility, taxes, currency, prorating, and the final approved charge.
Everything you need to know before adding another app.
Does Radiant replace my existing size chart?
It can power a complete size chart, guided sizing, or both. Shoppers who prefer the full table can still use it.
How does the recommendation work?
Radiant uses a few relevant shopper details and the ranges in the chart assigned to that product. When the chart supports a match, it returns the best available size with useful fit context.
Does it store shoppers' body details?
No. Height, weight, birth year, body-shape answers, and estimated measurements are processed in the shopper's browser and are not sent to or stored on Radiant or Shopify servers.
Can I control which products use each chart?
Yes. Assign charts by product, collection, product type, vendor, tag, or across the store. More specific rules take priority.
Will it match my storefront?
Paid plans unlock colors, typography, presentation, merchant logo, and result treatment. Growth and Scale also include custom visual assets.
Does it work on mobile?
Yes. The launcher and sizing journey are responsive and touch-friendly, so shoppers can reach an answer on the product page they are already viewing.
What happens when I reach my plan limit?
New Smart guidance pauses until the allowance resets or the plan changes. The full size chart remains available, and Radiant does not add an unexpected usage bill.
Give every shopper a clearer answer before they buy.
Start with your real catalog and turn sizing from another question into clear product guidance.
Shopify confirms pricing, billing terms, and any trial eligibility before approval.