Companies Using Kiwi Sizing

Size charts are a fashion problem, and Kiwi Sizing's customer list says so plainly. Our October 2026 crawl finds Kiwi on 18,568 live domains, 4,394 matched to a company, 2nd of 59 in Product Customization. A domain counts when a page loads Kiwi's script from its kiwisizing.com servers or sets up the object that script creates. Kiwi often waits for a product page: of the open homepages in our sample, 28 didn't load it, and five of the eight I followed to a product page did.

Installs, not open stores

I opened 299 random Kiwi domains in October. 15 no longer resolved, 9 showed Shopify's password page, 3 were parked and 1 was closed: 28, or 9.4%. Over half of that is expired domains that still carry their last Kiwi reading until our crawler returns. The accounts are clean, though. Where the script names the Shopify store, 4,282 domains map to 3,650 stores, and the largest covers 19 domains.

Sales Signal: budget for one dead row in ten. Check a domain resolves before it enters a sequence, and dedupe country domains to the parent brand.

The chart and the churn

Kiwi reads 7,344 in June, 10,837 in July, 17,219 in August, 18,463 in September and 18,568 in October. The July and August steps reflect our side, the domains we cover and the signals we detect with, because the crawled domain set turns over every month. Since September the line has barely moved. 5,053 domains dropped Kiwi since we began tracking it on 16 March 2026, and 613 of those still run it on another hostname.

"Kiwi Sizing is mostly a clothing-store tool. Apparel industries are 56.45% of its matched companies, and the largest outside fashion sell merchandise, from In-N-Out's company store to CD Projekt Red's gear shop." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales Signal: 5,053 drops in seven months make this a moving list. Refresh it monthly, and treat a store that still runs Kiwi as one that is working on fit and returns, the moment to pitch anything else that cuts returns.

Who the customers are

65.88% of matched companies with a known size have 1 to 10 employees and 22.08% have 11 to 50. The founding years point to the direct-to-consumer era: 47.02% from the 2010s and 27.01% from the 2020s. The larger names fall into two groups. Fashion and footwear brands run it on their main store, including New Era Cap, KITH, Vera Wang, Aviator Nation and Bata. Brands from other trades run it on a merch shop, such as In-N-Out Burger, Carhartt's Reworked resale site, CD Projekt Red, BioWare and Tomorrowland.

Sales Signal: at large companies the buyer is the merchandise or licensing team, not the main ecommerce team. Address them by the shop subdomain.

India comes second

The United States leads with 1,361 matched companies, and India is next with 512, ahead of the United Kingdom (440). Add Pakistan's 87 and South Asia holds 13.63% of matched companies. The named stores show why: Walkaroo, Sabyasachi, Rahul Mishra, Diners and Bata Pakistan all run Kiwi. Our script records back it up from the checkout side, with GoKwik's scripts on 155 Kiwi domains and Shiprocket's on 157, both Indian services.

Sales Signal: a vendor selling to Indian or Pakistani fashion brands on Shopify will find a concentrated list here. Pair it with GoKwik or Shiprocket detection to find stores that already invest in conversion and delivery.

Rivals run beside it

Our switching tests found nothing worth charting, because most domains seen with Kiwi and a rival still run both. 688 domains run Kiwi and Printful today, 196 Kiwi and Eastside Co Size Matters, and 68 Kiwi and Bold Options. Printful leads the category table with 93,857 domains, but it prints products; it lands in Product Customization through its storefront code, not because it sizes anything. Among fit tools, Kiwi's 18,568 domains are more than three times Volumental's 5,004.

"When a store runs Kiwi and a second sizing app, it usually keeps both. Size charts get added to, not swapped out." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales Signal: a rival fit-recommendation vendor should sell an upgrade on top of Kiwi's charts, not a replacement. The 196 stores running two size tools are the ones already shopping.

The stack around it

Shopify runs on 99.94% of Kiwi domains. Klaviyo's email tool is on 37.79%, with Judge.me at 23.01% and Loox, a photo-review app, at 9.53%. Google Analytics is on 56.96%. Returns tools sit close by: Redo's scripts load on 206 Kiwi domains in our script records, a reminder that the same team buys sizing and returns software.

Sales Signal: about six Kiwi stores in ten don't run Klaviyo's email tool. Email and SMS vendors that specialise in fashion have plenty of room here.

What it costs

Kiwi's pricing page (checked 14 October 2026) lists a Free plan with three charts and a watermark, Premium at $7.99 a month, Plus at $14.99 and Ultimate at $26.99. Plus and Ultimate add usage fees by monthly orders, from $5 at 100 orders up to $700 on Ultimate above 20,000. Paid plans start with a 14-day trial.

Sales Signal: usage fees tie Kiwi's bill to order volume, so stores on Plus or Ultimate are the ones with real traffic. We can't see the plan, but a recommender widget on product pages is a good hint.

Key takeaways

1. 18,568 live domains, 2nd of 59 in Product Customization with 11.77%.

2. 56.45% of matched companies are in apparel industries.

3. India is the second country, with 512 matched companies.

4. 9.4% of a random sample was expired, parked, closed or locked.

5. Rival size tools run beside Kiwi rather than replacing it.

How to use this list

Check domains resolve, group country sites by brand, then filter by country and size. For the full list of 18,568 Kiwi Sizing domains with company, size and stack data, explore TechnologyChecker.io.