SmartSize

Developers & custom themes

How SmartSize app embeds and app blocks work with custom Shopify themes, and what developers need to know for advanced integrations.

SmartSize app embeds for custom themes

Use this checklist when integrating SmartSize with a custom or heavily modified Shopify theme. Complete each step in order to verify that SmartSize

Custom theme integration checklist

Integration

SmartSize exposes a window.SmartRecom object on every product page where the app is active. This reference documents the complete API surface,

JavaScript API overview

Learn how to open and close the SmartSize modal, size chart, and quiz popups from your own JavaScript code. This is useful for custom button

Triggering the modal programmatically

SmartSize emits custom events during the quiz lifecycle. Use this guide to listen for modal open, close, and result-update events, with complete

Listening to quiz events

Complete reference for the window.SmartRecom.getResult() return value, including the full result object schema, topCandidates array structure,

Reading recommendation results

JavaScript API

This guide shows you how to apply your own CSS to the SmartSize fit quiz and size chart popups so they match your store's branding.

Style your popups with custom CSS

A complete reference for every CSS class in the SmartSize storefront widgets. Use these classes to customize the quiz and size chart appearance to

CSS customization reference

Styling

SmartSize uses a comprehensive image optimization strategy inside the popup to reduce bandwidth, improve Core Web Vitals, and maintain a responsive

Image optimization in the popup

SmartSize uses multiple defensive strategies to ensure the quiz and size chart popups render correctly regardless of the merchant's theme CSS,

Styling resilience and conflict prevention

Reference for SmartSize data handling practices, including registered Shopify webhooks, GDPR compliance, data retention policies, and what happens to

Data privacy and app uninstallation

Advanced topics

Find answers and get help from Intercom Support and Community Experts

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Ship something

Connect the tools your team already uses to bring data in.

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A quick lap of the product so you know where everything lives.

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Because you already asked about invitations, this prototype demo can add the follow-up: use the role selector before sending each invite to limit access to the teammate responsibilities.

Prototype role-limiting follow-up

This prototype demo suggests starting with your workspace profile, inviting the team members who need access, and then connecting the integrations you use.

Prototype getting-started answer

In this prototype demo, integrations are configured from workspace settings. Choose the integration, connect the account, and review the enabled permissions.

Prototype integrations answer

In this prototype demo, invite teammates from workspace settings, then choose the access each teammate needs before sending the invitation.

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This prototype demo does not have a scripted answer for that question yet. Try asking how to invite your team or open a source article. No production Fin API was called.

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