Operating context
DTF-By-Size is a custom Shopify app that prices DTF products from customer-entered width and height using merchant-defined rules — solving a gap in Shopify’s standard variant model for dimension-based pricing.
Xpertixe · Project
DTF-By-Size
Custom Shopify app for real-time dimension-based pricing with admin controls for size limits and pricing logic.
The challenge
Shopify’s variant model does not support custom dimension-based pricing. DTF merchants were forced to create dozens of manual variants or calculate prices outside the platform.
The approach
Customers enter custom width and height on the product page; pricing calculates in real time from merchant rules, with an admin panel for pricing config and size limits fully integrated with Shopify cart and checkout.
What was delivered
Shopify app for custom size inputs, rule-based pricing, and admin configuration for DTF merchants.
Evidence boundary
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