Rendered Fits · Shopify fashion app
Complete the Look app for Shopify: outfits with a size for every piece
A Complete the Look app shows a shopper the other pieces that go with the product they are viewing, so they can buy the outfit rather than one item. Rendered Fits does this on Shopify product pages with a size recommendation for each garment, a one-click whole-outfit cart and an optional try-on of the full look.
This guide explains how it works, the ways to add outfit suggestions to a Shopify store (including the free one), how to set it up, what it costs and where it falls short. Rendered Fits wrote it and is one of the options discussed.
By the Rendered Fits team · Reviewed 20 October 2026
What “Complete the Look” means on a fashion store
Retailers use several names for related ideas, and apps in the Shopify App Store use them loosely. The difference matters because each one solves a different problem.
| Pattern | What the shopper sees | Typical source |
|---|---|---|
| Complete the Look | Pieces that style with the product on the page: the trousers and top that go with a coat | Merchant pairings, rules or AI suggestions from the catalogue |
| Shop the Look | Every item in one styled photo, tagged so each can be bought | A lookbook or editorial image with product hotspots |
| Frequently bought together | Items other customers bought in the same order | Order history |
| Bundles | A fixed set sold together, often at a discount | A bundle app or Shopify bundles |
Our Complete the Look vs Shop the Look comparison covers these in more depth. For clothing, Complete the Look has one problem the others mostly ignore: an outfit needs a size in every piece, and those sizes are often different.
How Complete the Look works in Rendered Fits
The shopper's details carry across the outfit, so they do not re-enter measurements for each piece. Each item keeps its own Shopify variant in the cart, so a shopper can take a size 10 jacket with size 12 trousers. Analytics in the app show which products were sized, tried on and outfitted, and which were bought.
Four ways to add outfit suggestions to Shopify
| Route | How it works | Good for | Watch out for |
|---|---|---|---|
| Shopify Search & Discovery (free) | Choose complementary products for each product in Shopify's free app; Online Store 2.0 themes that support it show them on the product page | Small catalogues, a first test | Pairings are manual; no per-item size help or outfit cart |
| Theme sections or metafields | A developer or theme feature links products and shows them as a styled row | Brands with an in-house developer | Maintenance falls on you; still one size choice per item |
| Bundle or upsell app | Sells a fixed group of products together, often with a discount | Sets and gift boxes | Built for promotions, not styling; sizes often handled awkwardly |
| Outfit or Complete the Look app | Suggests coordinating pieces on the product page, sometimes with try-on and sizing | Fashion catalogues with many combinable pieces | Check how suggestions are chosen, whether sizes are per item, and what it costs |
If your catalogue is small and your pairings rarely change, start with Search & Discovery. An outfit app earns its cost when you have more combinations than you can curate by hand, or when shoppers abandon because they are unsure of sizes across several pieces.
Setting it up in five steps
- Install Rendered Fits from the Shopify App Store and choose the Complete plan. Complete the Look is part of Complete and Enterprise; the 14-day trial on Complete lets you test it first.
- Add the button to your product template in Shopify's theme editor and save. No theme code is edited.
- Check your catalogue. Start with products that genuinely belong together, with clear images, size variants and a usable size chart on each piece.
- Preview on your own store on a phone and a desktop. Try a shopper who needs a different size in each piece, and confirm every variant reaches the cart correctly.
- Show it to shoppers when you are happy. You can hide it again from the app at any time.
The help centre and the step-by-step setup guide cover each screen in more detail.
Why per-item sizing matters for outfits
A shopper may need a different size in a jacket, trousers and top, and brands cut each category differently. An outfit tool that applies one size label to the whole look creates exactly the wrong-size orders that become returns. Rendered Fits recommends a size per garment from that garment's own size information, using the details the shopper has already given.
A generated image is a visual preview. It cannot prove how a waistband, shoulder or sleeve will fit. Keep your size charts accessible and check measurement units. Our size recommendation guide explains the inputs and their limits.
What to check before switching it on
- Catalogue relevance. Do the suggested pieces suit your brand's styling rules for colour, category and season? Are they in stock?
- Variants and availability. Do sold-out sizes show correctly, and does each chosen size survive all the way to cart?
- Image quality. Check the whole-outfit preview against the real garments, and say clearly that the AI image is illustrative.
- Mobile journey. Test discovery, sizing, try-on and cart on a phone. Note where shoppers leave the flow.
- Measurement. Record outfit suggestions shown, pieces selected, cart adds and orders separately. A purchase on its own does not prove the suggestion caused extra revenue or fewer returns.
Use the measurement guide and the catalogue review worksheet for a fair before-and-after comparison.
What it costs
| Plan | Price | Complete the Look |
|---|---|---|
| Free | $0 a month | Not included. Sizing on one selected product and 5 try-on images a month |
| Complete | $349 a month, 14-day trial | Included, with full-catalogue sizing, whole-outfit cart and 1,000 try-on images per paid cycle (50 during the trial) |
| Enterprise | $999 a month, no trial | Included, with 5,000 try-on images per paid cycle |
USD, billed monthly through Shopify, excluding applicable taxes; one Shopify storefront per plan; no percentage-of-sales fees. See current plans, allowances and trial terms.
What it can't do
- It can only suggest products you sell. Thin catalogues produce thin outfits.
- Suggestions are not a stylist's judgement. Review them for your best-selling products before launch.
- A size recommendation needs usable size information for each piece, such as a size chart in text rather than an image. Check each product in preview before launch.
- The try-on image shows how an outfit might look, not how it will fit.
- It is built for adult clothing. It is not offered for children's ranges.
Questions fashion merchants ask
Which Shopify outfit builder recommends a size for each garment?
Rendered Fits combines Complete the Look outfit suggestions with product-specific size recommendations. A shopper can need different sizes in a jacket, trousers and top, so each garment uses its own available variants and sizing information. Check supported products and usable charts before enabling the journey.
Can shoppers add a whole outfit to cart on Shopify?
Yes. Rendered Fits supports individual-item and whole-outfit cart choices on eligible products. Each item keeps its selected Shopify variant, so a shopper can choose different sizes across the look. Check stock and test the enabled workflow on your theme before launch.
Is Complete the Look included in the free Shopify plan?
No. Free includes personalised sizing on one selected product and 5 try-on images per monthly allowance period. Complete includes full-catalogue sizing, Complete the Look and outfit cart for $349 a month, with a 14-day trial and 50 try-on images total during that trial. Paid plans cover one Shopify storefront; prices are in USD, excluding applicable taxes.
Can I show complementary products on Shopify without an app?
Yes. Shopify's free Search & Discovery app lets you choose complementary products for each product, and many Online Store 2.0 themes can show them on the product page. You pick the pairings by hand, and the shopper still chooses a size and adds each item separately.
Try it on your own collection
Start the 14-day trial on a small group of products, preview the outfits and sizes on your store, and decide before shoppers see anything.