Rendered Fits Alternatives
The Kiwi Sizing Alternative for Shopify Clothing Brands
As featured in Vogue College of Fashion · The Jockey Club Style Awards
Kiwi Sizing is one of the longest-standing size-chart apps on Shopify, listed on the App Store since March 2018, and it is genuinely good at what it does. It puts a clean, well-presented size chart on your product page. Its Shopify listing shows a Free plan (up to 3 size charts, with a Kiwi watermark) and paid plans at $7.99, $14.99 and $26.99 a month. The Plus and Ultimate plans, the ones that include Kiwi’s size recommenders, add charges based on order volume. The listing carries 1,239 reviews averaging 4.7 out of 5.
Kiwi Sizing prices, plans and review figures checked 13 October 2026 on the Kiwi Sizing Shopify App Store listing. Prices change; check the listing before you decide.
The reason brands start looking for an alternative is not that the charts are bad. It is that a chart is a document, and a document cannot answer a question.
The difference in one line
A size chart shows a shopper the numbers and asks them to work out their own size. A size recommendation reads their measurements and tells them which size to buy in that specific garment.
| Static size charts | Rendered Fits | |
|---|---|---|
| What the shopper does | Reads a table and interprets it | Enters their measurements once |
| What they get back | The same chart every other shopper sees | A size for that specific garment |
| Between two sizes | The shopper guesses, or buys both | The recommendation resolves the bracket |
| Second visit | Reads the chart again | Measurements are remembered |
| Seeing it on themselves | Not available | Optional, from their own photo |
Where the gap actually is
Between self-serve size-chart apps at the bottom of the market and enterprise fit platforms with a four-figure monthly floor at the top, there has not been a real fit-intelligence option for a mid-market Shopify clothing brand. That gap is the entire reason Rendered Fits exists.
When Kiwi Sizing is still the right answer
If what you need is a tidy, well-presented size chart and nothing more, Kiwi does that well and does it cheaply. If your problem is shoppers landing between two sizes, ordering both, and sending one back, a chart is not the tool for that job.
We are not going to promise you fewer returns. Nobody can promise that before they have seen your cohorts, and anyone who does is guessing with your money. What we will promise is on this page instead.
What Rendered Fits actually is
A Shopify sizing intelligence app for clothing brands, built to tackle the returns and lost sales that come from customers guessing their size. A shopper puts in their measurements, gets a bespoke size for that specific garment rather than a generic chart reading, and then has the option to see it on themselves before they buy.
Questions merchants ask
What is the best Kiwi Sizing alternative for Shopify?
Rendered Fits is the alternative for clothing brands that have outgrown a static chart. Kiwi Sizing is built around size charts, with size recommenders on its Plus and Ultimate plans; Rendered Fits reads a shopper’s measurements and recommends a size for the specific garment they are looking at, with an optional try-on from their own photo.
Does Rendered Fits replace my size chart?
No. Your size charts stay, and we will clean them up or generate the missing ones as part of setting you up. The recommendation sits on top of them and does the interpretation the shopper would otherwise have to do themselves.
How is this different from a size quiz?
A quiz infers a body from a handful of preference questions. Rendered Fits works from actual measurements against the garment’s own chart, and remembers them, so the second product a shopper looks at is already answered.
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
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All Rendered Fits alternatives · The 2026 Shopify fit and try-on comparison