Rendered Fits Alternatives
As featured in Vogue College of Fashion · The Jockey Club Style Awards
Kiwi Sizing is the default size-chart app on Shopify and it is genuinely good at what it does. It is installed on roughly 16,000 stores, it carries over a thousand reviews, and it puts a clean, well-presented size chart on your product page for somewhere between $6.99 and $24.49 a month.
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.
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 |
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.
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.
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.
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 presents a chart; 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.
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All Rendered Fits alternatives · The 2026 Shopify fit and try-on comparison