Ring Sizing App for Shopify

Increase buyer confidence with the perfect size

A guided ring sizing workflow embedded directly on your product page, helping shoppers measure accurately, feel confident before checkout, and reduce size-related returns.

Add to your store View demo

* Store password: rightsize

  • US, UK & EUSize charts built in
  • Theme extensionNo manual theme edits
  • On-page popupShoppers never leave
RightSize ring sizing workflow on a Shopify product page: measure, get a size recommendation with confidence score, and add to cart

How it works

From measurement to checkout, on the product page

Shoppers open the guide, enter their measurements or use the ring matcher, receive a recommended size with a confidence score, and add to cart without leaving your store.

Step 1

Measure

Enter inner circumference or diameter, with optional knuckle and band width for a better fit.

Step 2

Match

RightSize maps measurements to your size chart and surfaces the best US, UK, or EU size.

Step 3

Buy with confidence

A clear recommendation, nearby alternatives, and a strong add-to-cart action at the moment it matters.

New feature

Size a ring they already own

A guided on-screen sizing workflow for shoppers who already have a ring. They calibrate with a standard credit card, resize a circle to match the ring opening, and get a size recommendation from your chart.

  • Credit-card calibration for accurate on-screen sizing
  • Resize the guide to match the ring opening
  • Same size chart as manual measurement
  • Best accuracy on laptop or tablet
Already have a ring: calibrate with a credit card, then match the ring opening on screen to find size

Confidence at checkout

Turn confidence into checkout

Use your merchant sizing data to generate recommended sizes and confidence scores directly on product pages, so shoppers feel sure before they buy.

  • Uses your sizing data and editable size settings
  • Confidence-based size suggestions on the product page
  • Strong call-to-action once a size is generated
  • Clearer fit guidance to help reduce returns
Ring size recommendation with high confidence score and add to cart button on a Shopify product page

Built for jewelry stores

Everything you need, nothing you don’t

  • International sizing

    US, UK, and EU measurements in one flow, less confusion for cross-border shoppers.

  • Theme-safe install

    Add the app block from the theme editor. Works with existing product pages without layout changes.

  • Manual & ring matcher

    Two paths to the same recommendation: type measurements or size a ring they already own.

  • Your size chart

    Connect your store’s chart via metaobjects, your data, your rules.

  • Desktop & mobile

    Optimised sizing experience across screen sizes, with calibration tuned for larger displays.

  • Engagement insights

    Track how shoppers interact with the guide so you can measure impact over time.

Ready to help shoppers find their size?

Install RightSize, add the block to your product page, and enable the ring matcher when you’re ready.

Get RightSize Contact support