Rendered Fits · Merchant guide
Sizing and virtual try-on resources
Practical buying guides, evaluation worksheets and product information for Shopify fashion merchants.
By the Rendered Fits team · Reviewed 6 October 2026
Choose a shopper experience
Virtual try-on
Watch the demonstration and check product imagery, theme placement and the shopper journey.
Size recommendations
Understand the inputs and prepare product-specific sizing information.
Complete the Look
Review outfit suggestions, per-item sizes and whole-outfit cart choices on your catalogue.
Compare Shopify apps using the same merchant test.
For luxury fashion teams
Luxury virtual try-on
Evaluate brand presentation, garment detail and the shopper journey across your collection.
Catalogue evaluation scorecard
A repeatable test with a downloadable worksheet for your buying and ecommerce teams.
Ready-to-wear tailoring
Separate visual styling from shoulder fit, sleeve length and alterations.
Research and reference
- Shopify Size Chart Report 2026 — what 829 fashion stores publish about size and fit, with downloadable figures.
- Clothing size converter — UK, US and EU sizes for women, men, shoes and children.
- Complete the Look vs Shop the Look vs Frequently Bought Together — what each pattern is and when to use it.
- Fit and sizing glossary — 44 terms from ease and fit notes to size bracketing and llms.txt.
- Sizing and try-on by category — dresses, tailoring, denim, maternity and more.
Evaluate the result
- Free size-chart audit — check your store's published size information in seconds.
- AI agent fit check — see what ChatGPT and other AI assistants receive about your sizing.
- Size-chart checklist — a downloadable worksheet for product data.
- Measurement guide — separate use, purchases and mature returns.
- Break-even calculator — model your own assumptions and costs.
- Merchant FAQ — setup, quality, privacy and pricing questions.
Verify the product
Public merchant feedback · St Andrews evidence note · About Rendered Fits · Plans and allowances
See whether Rendered Fits suits your store
Try your product imagery, check size guidance and review the shopper journey before rolling out.
Plan an evidence-led Shopify trial
Read how to evaluate a fashion conversion app before choosing your measures. For AI shopping research, start with the size-chart evidence from 829 Shopify stores and its sampling limits.