Vendor-Based Dynamic Size Chart Links
The Opportunity
An app that automatically shows the right size chart link on product pages based on the product vendor and only when a size option exists. This helps stores keep sizing content organized across many brands or suppliers without theme-specific customization.
"Merchants need a way to display different size chart links per vendor on product pages, especially after switching themes where the built-in theme behavior no longer works."
Market Validation
Detailed Analysis
Proposed Solution
Provide a product-page widget or theme app block that conditionally displays a size chart link based on vendor, product type, tag, or metafield, with a modal or page link to the matching chart.
Target Audience
Shopify merchants selling apparel, footwear, or multi-brand catalogues with vendor-specific sizing
Competitive Landscape
Size Matters, Kiwi Sizing, Clean Size Charts, Avada Size Chart & Size Guide
Implementation Notes
Build a theme app extension with a product-page block that checks variant options for a Size field and resolves the correct size chart from vendor-mapped metafields, tags, or rules. Include fallback logic, per-vendor chart management, responsive modal rendering, translation support, and compatibility testing across Online Store 2.0 themes.
Evidence from Merchants
Real quotes from Shopify community forums
"The link is only visible when there is a 'Size' option on the product."
"My current theme does this but we are switching themes and it does not have the capability."
Key Pain Points
Inability to display size chart links based on vendor when switching themes.
highMentioned by 1 merchants
Impact: Potential loss of sales due to customer confusion over sizing
Market Metrics
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