by StaytunedPartner
Boost your Shopify store sales with size charts and AI-powered size recommendations. Reduce returns, improve fit accuracy, and customize your sizing experience.
Kiwi helps you remove any sizing uncertainty with customizable size charts and AI-powered fit recommendations that guide shoppers to the right choice. The result? More confident purchases and fewer returns. Add size charts and smart recommendations to any product, from apparel to dog collars. Quick to set up and gives you the flexibility to create a sizing experience that looks professional and fits your brand.
Free Plan
Free
Premium
$6.99 /mo
Plus (Popular)
$12.49 /mo
Ultimate
$24.49 /mo
Used by 43,309 Shopify stores
Data sourced from StoreLeads
Kiwi offers a permanently free plan that includes 2 published size charts, dynamic size charts, full style customization, and automatic unit conversion — though it does display a Kiwi watermark. Paid plans start at $6.99/month (Premium) and go up to $24.49/month (Ultimate), with a 14-day free trial available on all paid tiers. Note that importing size charts from images or webpages requires purchasing separate import credits regardless of plan.
Kiwi is designed to be quick to set up without developer help. The app integrates via Shopify's theme editor using app blocks, and most users can get started within minutes by selecting a ready-made template or importing an existing chart. The onboarding flow walks you through brand color, logo, unit preferences, and chart placement step by step.
Kiwi is compatible with Shopify Online Store 2.0 themes via native app blocks and works with most third-party themes and page builders like GemPages. That said, some merchants have reported theme conflicts after switching themes, though the Kiwi support team has been noted to work through compatibility issues on a case-by-case basis.
Kiwi uses machine learning to power its size recommender, offering three modes: an Advanced Apparel Recommender (predicts body size from inputs like age and gender), a Generic Table Recommender (for products like pet gear or children's items), and a Custom Recommender built on your own logic. The goal is to give shoppers confident, accurate fit guidance that leads to fewer returns. The size recommender feature is only available on the Plus plan ($12.49/month) and above.
Yes — Kiwi supports automatic unit conversion between imperial (inches/pounds) and metric (cm/kg) measurements, and the Premium plan adds location-based unit detection so customers automatically see their preferred measurement system. The app also supports multi-language display, making it well-suited for international storefronts.
Support feedback is mixed but leans positive. The majority of reviewers praise fast response times, with some issues resolved in minutes or within an hour. However, a minority of reviews cite slow follow-through on technical problems and, in at least one case, an unprofessional support interaction. The app holds a 4.7-star rating across ~995 reviews, with 87% being 5-star.
This is a known concern: Kiwi does not currently offer a self-serve export feature for your size chart data. At least one long-term merchant reported being unable to export four years' worth of charts after deciding to leave the platform. Kiwi's team has acknowledged the limitation and stated they are working on manually extracting core data for affected users, but a full portable export option is not yet available.