Wrong size is one of the fastest ways to lose a sale or create a return. A Shopify size guide section puts fit facts where the decision happens.

Quick answer

Add a size guide block on the product template near the size options. Keep the chart honest and category-specific. Skip monthly size apps unless you need a body quiz or saved profiles.

Shopify size guide placement near product variants
Fit help should appear before the shopper abandons size selection.

What to put in the guide

  • Garment measurements or brand size mapping
  • How the item fits (true to size, oversized)
  • One sentence on exchanges if fit is wrong

Research → product → checkout

  1. Write the rows your category actually needs.
  2. Open the Size guide and info block product page.
  3. Buy once, install on Online Store 2.0, edit rows in the theme editor.

Also see product page sections and Shopify development for fashion.