Dimensions [dimensions] Field for Product Feed

Optional but Recommended for Physical Products in ChatGPT

The dimensions attribute provides the overall measurements of a product — its length, width, and height — along with the appropriate unit of measurement.
It helps ChatGPT and users understand the product’s scale, size, and packaging requirements when comparing similar items.

When to use

Use this field for physical goods where size and proportions influence purchase decisions, such as furniture, electronics, home goods, or apparel accessories.
It also helps improve visualization and search relevance when users ask size-related queries.

• [dimensions] should:
  • Include all three measurements (length × width × height).
  • Use consistent units (e.g., inches, centimeters).
  • Match your store’s or manufacturer’s official product specifications.
  • Follow a clear and readable format such as 12x8x5 in.

Format

• Type: String (formatted as L×W×H + unit)
• Units: Required if values are provided
• Accepted units: in, cm, mm, ft
• Repeated field: No
• Schema.org property: Product.depth, Product.width, Product.height

Examples:

Best practices

Note: Clear dimensional data improves product accuracy and enhances comparison capabilities within ChatGPT listings.

• Always include units (in, cm, etc.) when dimensions are provided.
• Maintain the order Length × Width × Height consistently.
• Use numerical values only (avoid text like “small” or “medium”).
• Don’t mix units (e.g., 10 in x 20 cm x 5 in).
• Don’t include packaging dimensions unless clearly labeled as such.

SEO / AI Tip

Including accurate dimensions allows ChatGPT to display more informative product comparisons and size recommendations.
It improves buyer confidence, reduces returns for mismatched sizing, and strengthens contextual ranking for size-related searches (e.g., “compact lamp”, “large bookshelf”).

Official Source: ChatGPT Product Feed Specs