Alternatives · SmartSize
SmartSize alternatives for Shopify: prices and features compared
Smart Size Chart & Size Guide (SmartSize) builds size charts, including from a photo of an existing chart, and adds an AI fit quiz on its Pro plans from $19 a month. Alternatives depend on what you want next: Kiwi or MP Size Chart for other chart tools; Rendered Fits, Woven Looks or AI Frame if you also want shoppers to see the clothes on themselves.
Disclosure: Rendered Fits publishes this page and is one of the alternatives. The facts below come from public Shopify App Store listings and vendor websites checked on 21 October 2026; we have not tested image or recommendation quality side by side. Listings change, so check them before you decide.
By the Rendered Fits team · Listings checked 21 October 2026
SmartSize at a glance
| From the listing | |
|---|---|
| Developer | SmartSize (Nuremberg, Germany) |
| What it does | Size charts and size guides, AI chart building from an image, and a "Find my size" fit quiz |
| Plans | Free (2 charts); Starter $9 (10 charts); Growth $12 (unlimited charts); Pro from $19 (fit quiz for 100 shoppers a month), with higher Pro tiers up to $499 on its website; 14-day trial on paid plans |
| Rating | 4.9 from 148 reviews |
| Launched | January 2022 |
| Built for Shopify badge | Yes |
| Setup | App embed, or an optional app block |
| Listing | Smart Size Chart & Size Guide on the Shopify App Store |
Reasons to look at alternatives
- You want shoppers to see the garment on themselves as well as get a size.
- You want outfit suggestions with a size for each piece.
- You want size recommendations priced by try-ons rather than by the number of shoppers who take a quiz.
SmartSize alternatives compared
Monthly prices in USD as each listing showed them on 20 or 21 October 2026.
| App | What it does | Free plan | Paid from |
|---|---|---|---|
| Kiwi Size Chart & Recommender | Size charts, size recommenders | 3 size charts | $7.99 (10 charts); recommenders from $14.99 |
| MP Size Chart & Size Guide | Size charts, AI size recommendations | 3 size charts | $6.95 (800 AI recommendations) |
| AI Frame | Size charts, size recommender, photo try-on | 10 try-ons, 10 charts | $19.99 (80 try-ons) |
| Woven Looks | Photo try-on, size recommendations, outfits | 25 try-ons | $399 (1,000 try-ons) |
| Rendered Fits | Size recommendations, outfits sized per item, photo try-on | 1 product sized, 5 try-ons a month | $349 (1,000 try-ons) |
See all 17 apps, with top plans, ratings and launch dates, in our Shopify try-on app comparison, or our list of size chart apps for Shopify.
Rendered Fits vs SmartSize
| SmartSize | Rendered Fits | |
|---|---|---|
| What it does | Size charts, AI fit quiz | Size recommendations, outfits sized per item, photo try-on |
| Free plan | 2 size charts | Sizing on 1 product, 5 try-ons a month |
| Paid from | $9 (10 charts); fit quiz from $19 | $349 (1,000 try-ons) |
| Try-on | Not described | Yes, on the shopper's own photo |
When SmartSize is the better choice
SmartSize is the better choice if you want polished size charts and an optional fit quiz at a low price. It can build a chart from a screenshot, has ready-made charts for print-on-demand suppliers, and its quiz keeps working past the monthly quota with a short delay instead of an overage charge.
When Rendered Fits is the better choice
Rendered Fits is the better choice if you want sizing, outfits and try-on in one journey on the product page. It recommends a size from your own chart for each product, sizes every piece of a suggested outfit, and lets the shopper try the look on. It costs more: Complete is $349 a month. See the shopper journey or how the sizing works.
About Rendered Fits. Rendered Fits is a Shopify app for fashion brands that recommends a size for supported products from the brand's own size chart, and can show shoppers an optional AI try-on preview. There is a Free plan, and Complete is $349 a month with a 14-day trial.
How to choose
- Decide which question your shoppers most need answered: "how will it look on me?", "which size?", or "what goes with it?".
- Shortlist two or three apps whose listings cover that question, and install their free plans or trials on the same products.
- Run the full journey on a phone, from product page to cart, and judge size advice separately from how realistic any image looks.
- Compare conversion and returns over the same period, not vendors' headline claims.
What Shopify merchants say about Rendered Fits
★★★★★ 5/5 ·
“Sienna & Sidney have been very responsive and adaptable to our needs. Its early days but first signs are that browsers are using the technology and it is contributing towards increased sales.”
Really Wild Clothing Company, United Kingdom · Shopify App Store review★★★★★ 5/5 ·
“Our partnership has significantly enhanced the customer shopping experience, resulting in increased sales and measurable value for our business. The team has been exceptional to work with—reliable, collaborative, and consistently committed to delivering high-quality service”
University of St Andrews Shop, United Kingdom · Shopify App Store reviewRead Rendered Fits reviews · See the reviews on the Shopify App Store
Frequently asked questions
What is a good alternative to SmartSize?
Kiwi Size Chart and MP Size Chart are other size chart apps with free plans. Rendered Fits, Woven Looks and AI Frame add photo try-on to size recommendations.
How much does SmartSize cost?
On 21 October 2026 its listing showed a free plan for 2 charts, $9 and $12 chart plans, and the fit quiz from $19 a month for 100 shoppers. Its website lists Pro tiers up to $499 a month for 10,000 quiz users.
Does SmartSize have virtual try-on?
Its listing text and website describe size charts and a fit quiz, not virtual try-on, although the listing is tagged with a virtual try-on category feature.
More comparisons: all alternatives · 17 Shopify try-on apps compared · Rendered Fits pricing