FitBlocks: Mobile Size Chart

Sizing and fit content that actually works on a phone. Add size charts, fit guidance, and outfit pairings to your product pages without editing your theme.

FitBlocks is a Shopify app. Open it from your Shopify admin under Apps, or install it from the Shopify App Store.

• Size Chart. Build measurement tables once, assign them to products, and they appear below the buy buttons — with a cm/in toggle built in.
• Fit Guide. Tell shoppers whether an item runs small, large, or true to size, so fewer of them guess wrong.
• Sticky Size Help. A floating trigger that keeps sizing one tap away while a shopper scrolls a mobile product page.
• Complete the Look. Pair matching products to lift average order value, using your real catalogue prices.