Digital-first jewelry brands have been experimenting with ways to let consumers size their fingers for rings for years. Vrai & Oro and Stone and Strand both sell plastic ring sizers for $4.50, while AUrate and others offer free, printable sizers.

But if this new bit of technology works well, those analog tools may soon be relics of e-comm days gone by.

Yesterday a technology company called Radius Technologies launched a mobile-compatible ring sizer designed to plug in to jewelry retailers’ existing mobile stores.

Called PerfectFit, the digital sizer can accurately measure any finger to 1/8 of a size, according to its developers.

The tool works in under a minute. First you choose your gender, then you lay your finger on the screen and, using plus and minus signs, direct the lines to hug the shape of your finger.

Here’s a video on how it works:

PerfectFit is compatible with Apple and Android phones, and Radius claims the tool can be seamlessly integrated into existing mobile commerce platforms (such as Shopify).

In addition to ostensibly reducing the number of ring returns a retailer has to field (due to fit issues), the plug-in also collects and stores the data of every consumer who uses it.

“We’re excited to be the first company to solve an age-old problem for jewelers by providing them with patent-pending technology delivering a customer’s accurate ring size quickly and easily,” said Keith Foust, president of Radius Technologies, in a prepared statement.

Top:  A screenshot of the PerfectFit ring-sizing plug-in (photo and video courtesy of Radius Technologies)

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